Albert Newquay

Albert Newquay aka Jack of All Trades is a serial killer and stalker, among other things, and the show Profiler's most notorious antagonist. He's the stalker of Samantha Waters, as well as the killer of her husband Tom. He later took on an apprentice, Sharon Lesher, only for Lesher to be shot dead by Waters, as well as brainwashed and framed Donald Lucas for the crimes. The shocking revelation comes from realizing the central crimes Newquay is responsible for were all committed against people who knew or had ties to Waters, hoping for her to make the connection to brainwash her into being his lover and accomplice.