Criminals and Mass Murderer Crossovers

This is a unique list for moments when mass murderers and other criminals ended up affecting each other's behaviors, or share a relationship or connection with each other. You are allowed to add on to it.

Ex: Eric Harris's comments on the O.J. Simpson trial.
     Michael Soles ruining a planned murder by the BTK
     Jennifer San Marco's obsession with Son of Sam
     Joel Rifkin's encounter with Colin Ferguson
     Salman Abedi and Ian Brady being kept in the same mortuary

Mass murderer to Mass murderer doesn't count.

AmericaMan wrote:

Michael Soles ruining a planned murder by the BTK

Jesus Christ that one's obscure. Any more info on this? I never heard of it before.

QuestionMark wrote:

AmericaMan wrote:

Michael Soles ruining a planned murder by the BTK

Jesus Christ that one's obscure. Any more info on this? I never heard of it before.

I just read it from a poll on would you rather get stalked by a serial killer or get in a mass shooting. Apparently, STK said BTK didn't go along with his murder plan because Michael Soles caused an increased presence of police in the area.