Serial killer committed first murder aged just 19

Cody Legebokoff was convicted on four counts of first-degree murder after a trial that heard gruesome details about the circumstances of the victims’ deaths and testimony from Legebokoff himself.
He was convicted of killing Jill Stuchenko, 35; Cynthia Maas, 35; Natasha Montgomery, 23, and Loren Leslie, 15.