A young mother is found murdered in her home; detectives suspect her fiancé or ex-husband.
After a house fire is deemed intentional, detectives believe a close family member lit the match.
A man is found dead in his backyard; the investigation leads to a woman he welcomed into his home.
A Florida man is reported missing and detectives are investigating his roommate.
Detectives uncover a sinister murder plot masterminded by someone within their inner circle.