Monster of Florence: Eight Couples Linked by a Single Handgun

Symbols and traces, my case investigation record 42

Monsters of Florence
eight pairs connected by a single pistol

From 1968 to 1985, eight couples and sixteen people were killed in remote places around Florence. The hardest thread connecting the incident was a .22 caliber bullet and pistol of a series.

Figure 1. Hilly and night roads outside Florence — Image:

From the conclusion of this record to
The judgment that a single pistol connects most cases is maintained. However, it cannot be concluded that the pistol was always shot by the same person. Although the single offender hypothesis is a little simpler, the possibility of conspiracy or weapons succession also remains until physical evidence is released.

Prologue: Recorded Night

After the night deepens, the data was spread on the desk. The first thing that caught my eye was not the answer, but the imbalance. Some scenes were as clear as photographs and some time zones were empty as a whole. People try to capture one clear scene and explain the whole thing, but I marked the empty section first. Mysteries arise because there are many clues, but they also arise because the distance between clues is too far.

Pietro Paciani and other figures were at the center of several investigations and trials, but no ruling remained to tie all cases to a single legal conclusion. The Beretta pistol, which was believed to have been used, was also not recovered.

I deliberately read the famous hypothesis at the end. First of all, when we encounter the conclusion, it seems that all objects and symbols exist for that conclusion. Therefore, the timetable, place, object, and original text were organized first, and the witness and interpretation were placed in different compartments. The novel-like atmosphere was drawn from the cold texture of the actual record, not from a made-up secret.

Figure 2. Lovers' Cars in the 1960s and 1980s — Image:

Case File: What I Could Believe

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Number	Confirmed Record	Current Reliability
1	Between 1968 and 1985, a group of eight couples were killed around Florence.	High
2	Several incidents were linked to ballistic features of .22 caliber Beretta and Winchester H Series ammunition.	High
3	The victims were in remote spaces such as in cars and camping sites.	High
4	In some cases, post-mortem damage was done to female victims.	Medium
5	Paciani's conviction was overturned on appeal and he died before a retrial.	Medium

The whereabouts of the pistol, the personal connection between the 1968 and later cases, the number of executors, and the identity of the final culprit have not been established.

Caution trap
'Unexplained' is not the same as 'supernatural', 'a huge conspiracy', and 'only this hypothesis is possible'. I didn't count the blanks as evidence.

Figure 3.2. Structure of a .22 caliber Beretta pistol — Image:

Scene Reconstruction: Finally, the place of the certain point

was changed to the actual movement, not the stage in your head. We divided the starting point, the last check point, and the location where the item was found and calculated the minimum time required in between. When the dramatic description of later generations was removed, small and specific elements such as sound and lighting, doors and roads, paper and ink, and the spacing of symbols came forward.

The person's mind was not fixed and the action was written first. The same behavior can be caused by fear, planning, error, and fatigue. If it is a code, the same symbol can be a sound, a word, a separator, and a meaningless sign. After writing down all possible roles, he erased the roles that conflict with other records one by one.

Clue 1. In 1968-1985, a group of eight couples were killed around Florence.

I split this sentence into three pieces first. It indicated who first checked, how close the confirmation was to the incident, and where the later interpretation was attached. Old events and codes turn into clearer stories than the original while being repeatedly cited. But clarity is not the same thing as accuracy. In my notes, I separated the direct record, the traces left by the object, and the reasoning of later generations into different colors.

This clue was then matched with the record, "Several events were linked to .22 caliber Beretta and the ballistic features of the Winchester H Series ammunition." It is not a good hypothesis if one hypothesis explains only the first sentence and avoids the second sentence. In particular, if it fails to pass the question, "Does ballistic continuity even guarantee the continuity of one performer?" the attractive explanation also lowered the score. I've seen clues that make the conclusion uncomfortable longer than clues that make the conclusion cool.

If you look at the clues this way, the case seems a little less dramatic. Instead, there is a boundary between how far it is clear and where it is imagined. That boundary is necessary to correct reasoning when new data are released. The most dangerous moment in the unwritten record is not when you make a false hypothesis, but when you turn the hypothesis into a sentence of fact.

Clue 2. Several incidents were linked to ballistic features of .22 caliber Beretta and Winchester H Series ammunition.

I split this sentence into three pieces first. It indicated who first checked, how close the confirmation was to the incident, and where the later interpretation was attached. Old events and codes turn into clearer stories than the original while being repeatedly cited. But clarity is not the same thing as accuracy. In my notes, I separated the direct record, the traces left by the object, and the reasoning of later generations into different colors.

The clue was then matched with the record, "The victims were in a remote space, such as in a car or a camping site." It is not a good hypothesis if one hypothesis explains only the first sentence and avoids the second sentence. In particular, if the question "Does the selection of the affected area refer to someone who knows the outskirts of Florence as a living area?" was not passed, the attractive explanation also lowered the score. I've seen clues that make the conclusion uncomfortable longer than clues that make the conclusion cool.

If you look at the clues this way, the case seems a little less dramatic. Instead, there is a boundary between how far it is clear and where it is imagined. That boundary is necessary to correct reasoning when new data are released. The most dangerous moment in the unwritten record is not when you make a false hypothesis, but when you turn the hypothesis into a sentence of fact.

Figure 4. Winchester H Series ammunition and shell — Image:

Clue 3. The victims were in a remote space, such as in a car or a camping site.

I split this sentence into three pieces first. It indicated who first checked, how close the confirmation was to the incident, and where the later interpretation was attached. Old events and codes turn into clearer stories than the original while being repeatedly cited. But clarity is not the same thing as accuracy. In my notes, I separated the direct record, the traces left by the object, and the reasoning of later generations into different colors.

Then, the clue was confronted with the record, "In some cases, female victims were damaged after death." It is not a good hypothesis if one hypothesis explains only the first sentence and avoids the second sentence. In particular, if it fails to pass the question, "Is the change in post-damage the learning of the criminal or the change in the executor?" the attractive explanation also lowered the score. I've seen clues that make the conclusion uncomfortable longer than clues that make the conclusion cool.

If you look at the clues this way, the case seems a little less dramatic. Instead, there is a boundary between how far it is clear and where it is imagined. That boundary is necessary to correct reasoning when new data are released. The most dangerous moment in the unwritten record is not when you make a false hypothesis, but when you turn the hypothesis into a sentence of fact.

Clue 4. In some cases, post-mortem damage was done to the female victim.

I split this sentence into three pieces first. It indicated who first checked, how close the confirmation was to the incident, and where the later interpretation was attached. Old events and codes turn into clearer stories than the original while being repeatedly cited. But clarity is not the same thing as accuracy. In my notes, I separated the direct record, the traces left by the object, and the reasoning of later generations into different colors.

The clues were then confronted with the record, "Paciani's conviction was overturned on appeal and he died before a retrial." It is not a good hypothesis if one hypothesis explains only the first sentence and avoids the second sentence. In particular, if it fails to pass the question, "Does ballistic continuity even guarantee the continuity of one performer?" the attractive explanation also lowered the score. I've seen clues that make the conclusion uncomfortable longer than clues that make the conclusion cool.

If you look at the clues this way, the case seems a little less dramatic. Instead, there is a boundary between how far it is clear and where it is imagined. That boundary is necessary to correct reasoning when new data are released. The most dangerous moment in the unwritten record is not when you make a false hypothesis, but when you turn the hypothesis into a sentence of fact.

Clue 5. Paciani's conviction was overturned on appeal and he died before a retrial.

I split this sentence into three pieces first. It indicated who first checked, how close the confirmation was to the incident, and where the later interpretation was attached. Old events and codes turn into clearer stories than the original while being repeatedly cited. But clarity is not the same thing as accuracy. In my notes, I separated the direct record, the traces left by the object, and the reasoning of later generations into different colors.

This clue was then matched with the record that "a group of eight couples were killed around Florence in 1968-1985." It is not a good hypothesis if one hypothesis explains only the first sentence and avoids the second sentence. In particular, if the question "Does the selection of the affected area refer to someone who knows the outskirts of Florence as a living area?" was not passed, the attractive explanation also lowered the score. I've seen clues that make the conclusion uncomfortable longer than clues that make the conclusion cool.

If you look at the clues this way, the case seems a little less dramatic. Instead, there is a boundary between how far it is clear and where it is imagined. That boundary is necessary to correct reasoning when new data are released. The most dangerous moment in the unwritten record is not when you make a false hypothesis, but when you turn the hypothesis into a sentence of fact.

Figure 5. Tuscan map showing damage points — Image:

Put three hypotheses on the same scale The

hypothesis was not evaluated as a cool sentence. The number of clues to be explained, the number of newly requested assumptions, and the degree to which they endure the opposite evidence were written, respectively. Even if one clue is fully explained, it is not a good hypothesis if the other records have to be discarded.

Hypothesis A. The same criminal committed the crime alone, storing the same pistol for a long time.

This explanation has the advantage of accepting "the formation of an incident group in which eight couples were killed around Florence in 1968-1985" as a relatively small assumption. I assumed that this hypothesis was correct and walked time and space all over again. Each time people, objects, and symbols moved to the next location, they wrote down the actions and times they needed. There must have been a hidden assumption at the point where the sentence was cut off.

The biggest weakness is that it does not fully explain "the victims were in remote spaces such as in cars or camping sites." If you keep adding accomplices, coincidences, and lost things to keep the hypothesis alive, you can explain anything. However, such an explanation does not predict new clues. I only scored when two independent records pointed in the same direction, and I scored every time I called in a new exception.

117100118

So, whether or not to adopt this hypothesis as a conclusion was judged not by atmosphere but by cost. The number of clues to be explained, the number of newly requested households, and the degree to which they endure evidence against them are listed in the same table. Novel scenes were used to show the texture of facts, but not as evidence to fill in the blanks.

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Hypothesis B. pistols were shared within one group, and executors differed by period.

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This explanation has the advantage of accepting "multiple incidents as a relatively small assumption that they were linked to the ballistic features of .22 caliber Beretta and Winchester H series ammunition." I assumed that this hypothesis was correct and walked time and space all over again. Each time people, objects, and symbols moved to the next location, they wrote down the actions and times they needed. There must have been a hidden assumption at the point where the sentence was cut off.

123103124

The biggest weakness is that it does not fully explain "in some cases, post-damage was done to female victims." If you keep adding accomplices, coincidences, and lost things to keep the hypothesis alive, you can explain anything. However, such an explanation does not predict new clues. I only scored when two independent records pointed in the same direction, and I scored every time I called in a new exception.

125104126

So, whether or not to adopt this hypothesis as a conclusion was judged not by atmosphere but by cost. The number of clues to be explained, the number of newly requested households, and the degree to which they endure evidence against them are listed in the same table. Novel scenes were used to show the texture of facts, but not as evidence to fill in the blanks.

127105128

Hypothesis C. The pistol of the first case was handed over to the later criminal, and different motives were grouped into one group of cases.

129106130

This explanation has the advantage of accepting "victims were in remote spaces such as in cars or camping sites" as relatively few assumptions. I assumed that this hypothesis was correct and walked time and space all over again. Each time people, objects, and symbols moved to the next location, they wrote down the actions and times they needed. There must have been a hidden assumption at the point where the sentence was cut off.

131107132

The biggest weakness is that it does not fully explain "Paciani's conviction was overturned at the appeal trial and he died before a retrial." If you keep adding accomplices, coincidences, and lost things to keep the hypothesis alive, you can explain anything. However, such an explanation does not predict new clues. I only scored when two independent records pointed in the same direction, and I scored every time I called in a new exception.

133108134

So, whether or not to adopt this hypothesis as a conclusion was judged not by atmosphere but by cost. The number of clues to be explained, the number of newly requested households, and the degree to which they endure evidence against them are listed in the same table. Novel scenes were used to show the texture of facts, but not as evidence to fill in the blanks.

Figure 6. Camping Site and Forest Access — Image:

Conclusions I abandoned

137111138

When I started the investigation, I was also drawn to the most famous explanation. It organized the case into one sentence and gave intention to everything. However, in contrast to the original record, each blank required a new coincidence. I erased the conclusion then and started again. Good reasoning is not about adding anything, but about removing unnecessary assumptions.

139112140

I deleted all the suspect names and re-mapped the map with only guns, ammunition, and places. Then, the continuity of the pistol was very strong, but the criminal behavior was not completely fixed. It could be a single learning or a small number of conspiracies that shared weapons.

141113142

In particular, the details repeated on later articles and the Internet were separated from the source. Just because the same sentence appears in multiple places does not mean that there are multiple independent sources. We first checked the possibility that one error was duplicated. After this process, the case became less colorful, but the weight of the remaining clues increased.

Figure 7. Ballistic marks compared with ballistic microscopy — Image:

Anti-evidence: Sentence to destroy my reasoning

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The investigation ends quickly if I gather data that upholds my conclusion. So I put the three most uncomfortable questions next to the conclusion.

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• Does ballistic continuity even guarantee the continuity of one executor?
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• Selection of the damaged site refers to a person who knows the outskirts of Florence as a living area.
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• Is the change in post-damage a learning or executor change of the criminal?

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These questions are not decorative. It is a switch that will change its conclusion when new data comes in. The ranking of the hypotheses changes immediately when directly linked information, such as the sighting source, preserved physical evidence, comparative samples from the same author, and independent dating. On the contrary, when the word "likely" increased, the ranking did not change.

Figure 8. Record room with investigation and trial documents — Image:

Final Reasoning: I Reached

159125160

Judgment
The judgment that a single pistol connects most cases is maintained. However, it cannot be concluded that the pistol was always shot by the same person. Although the single offender hypothesis is a little simpler, the possibility of conspiracy or weapons succession also remains until physical evidence is released.

161126162

This conclusion is not a complete final judgment. The direction calls for the fewest assumptions in the currently disclosed records and explains the most clues at the same time. It is also clear that what comes out changes the conclusion. Reliable original records, verifiable legal science data, and independent evidence directly linking people and objects are needed.

163127164

I do not write that the case is closed. Instead, write down how far you can close it. That boundary is the result of this investigation. The fun of mystery is not that anything is possible. It's about finding out what you can throw away among the possible explanations.

Figure 9. Comparing the Single Offender and Weapon Sharing Hypothesis — Image:

Additional Survey Record 1. Redraw the timetable

167130168

Re-expanding the data on the desk, this time covering the conclusion. "In 1968-1985 an army of incidents was formed around Florence in which eight couples were killed," he continued with a line of place and time. Unconfirmed sections were not filled by imagination but marked with blank squares. The larger the square, the lower the reliability of the hypothesis to pass through the section.

169131170

On top of it, I posted an explanation that "the same criminal committed the crime alone, keeping the same pistol for a long time." At first, everything seemed right, but when I substituted the question, "Does ballistic continuity even guarantee the continuity of one implementer?" a weak connection was revealed. Hypothesis has to endure the question. If you keep making new coincidences to avoid questions, you will create, not reasoning, from that moment on.

171132172

The results obtained in this section are not confirmed criminals or complete plain texts. Instead, it became clear which explanations required fewer assumptions, and what would flip the ranking if found. Even if the case is not completed, the scope of the investigation can be narrowed. This record is intended to leave that very narrow boundary.

173133174

Further investigation record 2. Disappeared link

175134176

Re-expanded the data on the desk and covered the conclusion this time. "Several incidents were linked to .22 caliber Beretta and the ballistic features of Winchester H Series ammunition," he continued in a line of place and time, leaving only "to be seen. Unconfirmed sections were not filled by imagination but marked with blank squares. The larger the square, the lower the reliability of the hypothesis to pass through the section.

177135178

On top of it, I posted an explanation that "Pistons were shared within one group, and practitioners were different from time to time." At first, everything seemed right, but a weak connection was revealed when the question was asked, "Does the selection of the affected area refer to someone who knows the outskirts of Florence as a living area?" Hypothesis has to endure the question. If you keep making new coincidences to avoid questions, you will create, not reasoning, from that moment on.

179136180

The results obtained in this section are not confirmed criminals or complete plain texts. Instead, it became clear which explanations required fewer assumptions, and what would flip the ranking if found. Even if the case is not completed, the scope of the investigation can be narrowed. This record is intended to leave that very narrow boundary.

181137182

Further investigation record 3. The path of movement of objects

183138184

Re-expanded the data on the desk and covered the conclusion this time. "The victims were in a remote space, like in a car or a camping site."The place and the time were lined up, leaving only one behind. Unconfirmed sections were not filled by imagination but marked with blank squares. The larger the square, the lower the reliability of the hypothesis to pass through the section.

185139186

On top of it, I posted an explanation, "The pistol of the first case was handed over to the later criminal, and different motives were grouped into one group of cases." At first, everything seemed right, but a weak connection was revealed when the question, "Is the change in post-damage the learning of the criminal or the change in the executor?" was substituted. Hypothesis has to endure the question. If you keep making new coincidences to avoid questions, you will create, not reasoning, from that moment on.

187140188

The results obtained in this section are not confirmed criminals or complete plain texts. Instead, it became clear which explanations required fewer assumptions, and what would flip the ranking if found. Even if the case is not completed, the scope of the investigation can be narrowed. This record is intended to leave that very narrow boundary.

189141190

Further Survey Record 4. Opposite Hypothesis Night

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I re-opened the material on the desk and covered the conclusion this time. In some cases, the female victim was damaged after death, and the place and time were continued in one line. Unconfirmed sections were not filled by imagination but marked with blank squares. The larger the square, the lower the reliability of the hypothesis to pass through the section.

193143194

On top of it, I posted an explanation that "the same criminal committed the crime alone, keeping the same pistol for a long time." At first, everything seemed right, but when I substituted the question, "Does ballistic continuity even guarantee the continuity of one implementer?" a weak connection was revealed. Hypothesis has to endure the question. If you keep making new coincidences to avoid questions, you will create, not reasoning, from that moment on.

195144196

The results obtained in this section are not confirmed criminals or complete plain texts. Instead, it became clear which explanations required fewer assumptions, and what would flip the ranking if found. Even if the case is not completed, the scope of the investigation can be narrowed. This record is intended to leave that very narrow boundary.

197145198

Further Survey Record 5. Distance between record and memory

199146200

I re-opened the material on the desk and covered the conclusion this time. "Paciani's conviction was overturned on appeal and he died before a retrial," he continued in a line of place and time. Unconfirmed sections were not filled by imagination but marked with blank squares. The larger the square, the lower the reliability of the hypothesis to pass through the section.

201147202

On top of it, I posted an explanation that "Pistons were shared within one group, and practitioners were different from time to time." At first, everything seemed right, but a weak connection was revealed when the question was asked, "Does the selection of the affected area refer to someone who knows the outskirts of Florence as a living area?" Hypothesis has to endure the question. If you keep making new coincidences to avoid questions, you will create, not reasoning, from that moment on.

203148204

The results obtained in this section are not confirmed criminals or complete plain texts. Instead, it became clear which explanations required fewer assumptions, and what would flip the ranking if found. Even if the case is not completed, the scope of the investigation can be narrowed. This record is intended to leave that very narrow boundary.

205149206

Additional Survey Record 6. Range of Last Scene

207150208

Re-expanding the data on the desk, this time covering the conclusion. "In 1968-1985 an army of incidents was formed around Florence in which eight couples were killed," he continued with a line of place and time. Unconfirmed sections were not filled by imagination but marked with blank squares. The larger the square, the lower the reliability of the hypothesis to pass through the section.

209151210

On top of it, I posted an explanation, "The pistol of the first case was handed over to the later criminal, and different motives were grouped into one group of cases." At first, everything seemed right, but a weak connection was revealed when the question, "Is the change in post-damage the learning of the criminal or the change in the executor?" was substituted. Hypothesis has to endure the question. If you keep making new coincidences to avoid questions, you will create, not reasoning, from that moment on.

211152212

The results obtained in this section are not confirmed criminals or complete plain texts. Instead, it became clear which explanations required fewer assumptions, and what would flip the ranking if found. Even if the case is not completed, the scope of the investigation can be narrowed. This record is intended to leave that very narrow boundary.

Figure 10. A long timetable from 1968 to 1985 — Image:

Records and references

· RAI Chi l'ha Visto — Il mostro di Firenze

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· American Academy of Forensic Sciences — case review

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※ This article is a commentary in the form of personal survey records based on public records and reliable data. I have distinguished between confirmed facts and my reasoning, and I update my judgment when a new official announcement is made. External material images were edited for some color and composition according to the permitted licensing conditions, and each image source was shown in the caption.