Teenage Boy Poses As a Mother And Kills College Student

Site: Craigslist

Date: Oct. 25, 2007

Backstory: Michael John Anderson acted as a married woman named "Amy" and lured college student Katherine Ann Olson into his home with a fake online baby-sitting ad just so he could experience what it felt like to kill someone. He would shoot Olson with a .357 magnum and hide her body at the Burnsville Nature Preserve. The media would label Anderson the first ever "Craigslist Killer."

Punishment: Anderson received a life sentence without parole.