Imette St. Guillen, a shining criminology grad student, was bar-hopping with friends in Soho one night in 2006. By morning, she was dead.

Anndrea Caruth was in a good stage of life: She had established an early childhood center in New York, and she had a happy relationship with her fiancé and a baby on the way. Then, the Bronx woman went missing.

Was the brutal slaying of Brooklyn pizzeria owner Louis Barbati a mob hit, a robbery gone wrong, or something else? 

Christopher Cooley, a kind-hearted Upper East Side widower, was found dead in his locked apartment. Did his new friend he met while receiving cancer treatment at the hospital have something to do with it?