Denise Bozarth, 34, and Edward Bozarth, 61, made for an unusual couple. But despite the 30-year age gap, they went on to have two children and set up home on a motor yacht called Screw U-2. The boat was docked outside Key Largo, Florida, and from the moment Ed arrived, an air of mystery surrounded him. Locals thought he was some kind of spy – then something strange happened.
On 23 June 2007, Denise turned up at her parents’ house with her two children, saying she had left Ed. A week later, on 1 July, police were called when neighbours complained of a foul stench coming from Screw U-2. When officers boarded, they discovered Ed's body stuffed into a large bag and hidden in the engine room. The medical examiner…