‘Prime Suspect: Murder In Suburbia’ investigates one of Britain’s most baffling cold cases.  Dr Roberts Jones was the beloved local GP in the picture-perfect town of Coggeshall in Essex. Married to the beautiful Diane Jones, they lived in a stunning 16th-century farmhouse.   Their lives appeared idyllic. But in July 1983, Diane suddenly vanished and, tragically, her body was later discovered with clear signs that she had been murdered.   Despite an extensive police investigation, no culprit was ever found.   Forty years on, this feature length special explores new evidence to investigate who killed her.  With first-person testimony from police detectives, friends and neighbours, it peels back the shocking layers to reveal that truth is stranger than fiction and that the reality of Diane’s secret life was far from what anyone imagined.