Bill Fontaine

Bill Fontaine is a one-time murderer and copycat with a brief appearance in Insight in Profiler. He copycatted the murders of "The Saturday Night Stalker", later revealed as Dr. Frances Barry, in his own murder of his mistress, Catherine Windsor.

Modus Operandi
Fontaine did what he could to practically replicate identically the MO of Barry. What details he missed is that he didn't mutilate Catherine Windsor, his only victim, along her scars from when she got plastic surgery, something only the killer would know. He also failed to stage the scene as a break-in, evidence obviously left behind that WIndsor knew and was casual with him because of their affair.