The world of American TV series: Starting with the L.A. Patrol.

After leaving the scene and returning to the Federal Building, Rhett had been waiting at the door of the conference room early. As soon as he saw Danny, he couldn't wait to put forward his needs.

"I need arrest records for gun violence and illegal gun possession in all New York City boroughs over the past six months except for the areas where shootings have occurred."

Danny followed him into the conference room and looked at the New York City administrative district map that had been painted out beyond recognition, with a puzzled look on his face, "I don't understand what you mean."

"Based on what you found at the scene, I don't think the suspect committed the crime near the area where he lives."

Seeing Red's confident look, Danny was even more surprised, "How do you know for sure?"

"This is a reverse profiling of the geographical environment." Emily explained helpfully.

"Although we don't have many clues at the moment, one thing can be confirmed. The murderer had a certain degree of planning. He committed the crime at the same time of the day. He made observations in advance and knew the location of the cameras at the scene."

"So?" Although Danny and Jack have worked together to solve crimes many times, this is the first time he has experienced BAU's seemingly unconstrained method of solving crimes, which relies purely on empirical theory and deduction, and cannot keep up with the thinking at all.

Fortunately, this was not the first time Red had dealt with "Muggles" and he took the initiative to explain, "Demand-driven serial killers like the 'Son of Sam' usually choose areas where they are comfortable to attack.

So when we connect his crime locations with lines, his general range of activities is basically framed. This is a geographical environment profile in the usual sense.

"So we can stay away from his residential area, right?" Danny suddenly understood, and at the same time he roughly understood what Red meant by drawing circles on the map.

"So apart from the fact that the murderer had a premeditated plan for where he committed the crime, was his choice of victims completely random? Or did these victims become targets because they just happened to be in the wrong place at the wrong time?" Jiejie asked. .

A serial killer with a plan and other goals will intentionally or unintentionally ensure that he attacks outside his comfort zone. "

The "DC Sniper" mentioned by Reid is well-known in the United States. From February to October 2002, a series of sniper attacks on innocent passersby broke out from Washington, DC (District) to Virginia and then to Maryland. .

Rhett nodded and said, "That's the case so far. Of course, we don't rule out the existence of a premeditated victim similar to the 'DC Sniper' who went on a killing spree to cover up his motive for committing the crime."

At noon the next day, Hotchner gathered everyone in the conference room. “The five victims were elderly people in their 60s, ordinary office workers, housewives, insurance salesmen, and backpackers traveling to New York. The five victims all came from different backgrounds. It has been confirmed and there is no overlap or commonality.”

"Then let us pray that he only limited the area of ​​​​the crime to Manhattan Island. If it were the whole of New York, it would really be like finding a needle in a haystack." Rossi sighed.

"Yes, but this also means that other areas in the city may become his targets." Emily murmured to herself.

There were a total of 27 victims, 17 died, and 10 others were seriously injured, including a 47-year-old FBI intelligence analyst.

This serial murder case was called the "Beltway Sniper Case" by the FBI, and the media called the murderer the "DC Sniper."

The victims of the "DC Sniper" did not distinguish between men, women, old or young, religion or color, and the attacks did not distinguish between day and night, once again causing panic in the old Americans who had just experienced 911/.

This serial murder case is different from other cases. There are two murderers, 41-year-old John Muhammad and his pedophile assistant, only 17-year-old Lee Malvo.

Both are of African descent, and Rossi’s notes record their family backgrounds in detail. John Muhammad’s original surname was Williams, but after 911/, he changed his surname to Muhammad out of admiration for someone. Morde.

Therefore, in Rossi's notes, his motive for committing the crime was divided into two stages. The early timeline was from February to September, and the motive or purpose of the crime was relatively confusing.

There were a total of 14 victims during this period, 7 dead and 7 injured. Some of them were killed for vendetta, some for robbery, and some simply for the purpose of practicing marksmanship and courage. Muhammad asked his assistant Lee Malvo to do it. hand.

After obtaining enough funds through robbery and other means, Muhammad purchased a Bushmaster XM-15 rifle with a holographic sight and a bipod and a 1990 blue Chevrolet Caprius sedan.

So the attack entered the next stage, a real terrorist attack.

The two modified the car and manually opened a shooting hole in the rear bumper of the car. Through this shooting hole, one person was responsible for driving, while the other person lay on the back seat of the car that was turned down, and placed the XM-15 rifle in the back seat. On the spare tire of the tank, shoot at a target three to four hundred meters away.

(As shown in the picture, it seems to have been drawn by an FBI expert after the fact.)

Because of the concealment of the crime modus operandi and the extremely long sniper distance (ordinary people would not notice an ordinary car parked three to four hundred meters away), although the two men acted extremely arrogantly, the police and FBI were still helpless.

If Muhammad hadn't been so arrogant that he called the police and claimed that the police had missed a tavern robbery, it's hard to imagine how high the number of victims would have been.

The FBI quickly re-investigated the crime scene in the tavern. It first confirmed the consistency of the case through ballistic comparison, and then found Muhammad's fingerprints on a magazine. Only then did it successfully determine his identity and issue a wanted warrant. make.

From October 2002 to October 10, 2, when the two were arrested, John Muhammad and Lee Malvo again killed 24 people and seriously injured another three people. During this period, two of the three people who were seriously injured were shot The torso was removed, and a large area of ​​internal organs was removed due to the huge cavity effect of the military rifle.

Rossi's notes contain very detailed records of interviews with the two men, especially some of John Muhammad's speeches before he was executed by lethal injection.

It was mentioned that in the early stages, Muhammad's real target was his ex-wife, in order to make the police believe that her death was consistent with those of victims who were randomly killed, so as to obtain custody of his three children.

However, what makes people feel ironic is that Muhammad's ex-wife was not shot from beginning to end. His first target was his best friend who had been encouraging his ex-wife to divorce.

By coincidence, in this attack with clear purpose, Nikiya, the niece of Muhammad's ex-wife's best friend Mildred, became the scapegoat.

It was "Son of Sam" and "DC Sniper" again. Everyone present was holding their chins or raising their heads, all of them seemed to have a headache.

This kind of random serial homicide is the last thing the police want to face, and it is also the case in which the BAU team can play the smallest role. There are very few clues in the early stage and the motive of the crime is difficult to determine, which brings great challenges to psychological profiling. of uncertainty.

But when there are enough clues and the profiling and behavioral predictions are extremely accurate, there is an eye-catching number of cases and the bodies of the victims.