Killers Amongst Us: (Part 4) Gorgeous Queens jogger Karina Vetrano murdered the one day dad stays behind.

A suspect emerges in the death of Karina Vetrano. 22-year-old Chanel Lewis is arrested and ultimately confesses to attacking the jogger. Traces of his DNA were found underneath her fingernails, on her neck and cellphone. But a conviction was slow in coming. Why? What happened during the trial? How does father Phil Vetrano remember his daughter today?