Behind Mansion Walls | Heir to Misfortune | S3E5

24-year-old millionaire Peter Dabish was son of Norman Dabish, founder of a powerful gym empire. In 2010, the brash young heir had just bought a fancy new apartment in an exclusive Detroit tower block, and asked his old friend Diana DeMayo to help him move in. Just a few hours later, Dabish phoned 911. When cops arrived, they found Diana DeMayo lying bloodied and barely breathing. Peter Dabish told cops DeMayo was drunk and fell down the steps. Diana DeMayo was rushed to hospital, but later declared brain dead, and taken off life support. A medical examiner concluded that DeMayo died from blunt force trauma - at least eight blows to the head. This was no fall down the stairs! Location - Detroit, MI

British gent Alun Phillips was heir to a massive fortune, and didn't need to work a day in his life. He and his beautiful wife Nadine lived a glittering life mixing with the British elite. Then in May 2000, Alun Phillips found his wife lying dead in the bath of their fashionable London home. Phillips called the cops, telling them he'd been asleep upstairs in his soundproof office. An intruder must have broken in during the night and drowned his wife, hoping to rob the wealthy couple. As British police started to search the scene, they realized there were no signs of forced entry or valuables missing. The subsequent investigation into this 'dream' marriage revealed a volatile relationship, and a husband obsessed by jealousy. Location - London, England.