* The method of murder was different. In the first two murders, the victims were stabbed to death. In the third murder, the victim was strangled.
* The location of the murder was different. The first two murders took place in the victims' homes. The third murder took place in a public place.
* The timing of the murder was different. The first two murders took place at night. The third murder took place in the daytime.
* The victim was different. The first two victims were women. The third victim was a man.
How the Execution of the Third Great Crime Resembled the Preceding Murders
* The murderer used the same weapon in all three murders. A knife was used in all three murders.
* The murderer left the same type of evidence at all three crime scenes. The murderer left behind fingerprints and DNA evidence at all three crime scenes.
* The murderer had the same motive in all three murders. The murderer killed all three victims because he believed that they had wronged him.
The similarities between the three murders suggest that they were all committed by the same person. The differences between the murders suggest that the murderer was becoming more brazen and confident.