Crime & Investigation Network

Alex Algeri is gunned down in 2001 and police struggle to piece together a motive. Two years pass before a tumultuous relationship comes to light, unveiling the killer.

Dr Harold Shipman, a respected GP, murdered some 250 patients. Despite suspicions raised by colleagues, it took years for the authorities to catch up with him. We reveal a shocking pattern of abusing trust.

An 18-year-old claims she doesn't remember stabbing her foster mother to death; a Los Angeles mechanic is questioned about the serial murders of local sex workers; an Oklahoma state senator is involved in sex trafficking of minors.

An army soldier is questioned about the shooting death of his teenage girlfriend; detectives interrogate a Brazilian expatriate about her husband's murder; a woman is questioned about the death of her 17-month-old daughter.

In a chilling tale of betrayal, Nikki Sue Entzel plotted with her lover to kill her husband, staging a deadly fire to cash in on life insurance-love, lies, and murder igniting a deadly conspiracy.

The hunt for Martin Duram's murderer goes cold for over a year until the emergence of an unlikely key witness, his pet parrot, leads detectives to his wife.

When a father of two is shot dead while driving, detectives closely retrace his steps to figure out who killed him.