The Devil Speaks

Dr Margo Prade is shot to death in the parking lot of her own medical practice in Akron, Ohio. Police discover her phone calls were being secretly recorded.

When Michael Humphreys and Sandra Walton are gunned down, detectives don't know who the intended victim was - until they find recordings of phone conversations.

When Sharon Garrison's family report her missing, there's evidence to suggest she left town. But a set of secret cassette tapes point to something far more sinister.

When detectives looking for missing mum, Tami Reay, find blood in her car they arrest her husband, Brad. But then they receive a tip, suggesting an entirely new suspect.

Joe Morrissey is brutally killed in an apparent home-invasion robbery. But detectives think the attack was personal and they hunt for suspects - including Joe's wife, Kay.

83-year-old grandfather Jack Rains is murdered at his home in Murfreesboro, Tennessee. Rumours emerge of an affair between the victim and a much younger woman.

Elderly couple Roy and Angie Woodley are found stabbed to death in their home. Initially believed to be a botched robbery, a vengeful family member becomes a suspect.

When Melissa Atkin is found bound and murdered in her home in Tennessee, detectives dig deep into her personal life only to uncover a vital piece of evidence.

When John Riebe is found dead in his home, the investigation quickly focuses on those close to him. Phone calls and voicemails prove key in cracking the case.

Billy Staton and his fianc? Leticia Castro vanish. The discovery of a burnt-out car and a shock confession reveal a deceit only a secret recording can untangle.

Robin Sowders is brutally beaten in his home and dies from his injuries. After his wife's surprising appearance at the police station, a wiretap reveals the truth.