Rayney tells of never-ending nightmare

Lloyd Rayney has spoken for the first time of his never-ending "nightmare" and has called for a cold case review of his wife's murder.

Seven years after Corryn Rayney was killed and her body buried in a Kings Park bush grave, the former prosecutor says the case can still be solved and he finds it hard to forgive police for their failure to get the investigation right.

Mr Rayney, who was acquitted nearly two years ago of wilfully murdering his wife, at times struggles to speak during an extraordinary documentary to be screened in a special presentation on Channel 7 at 8pm.

SEVEN YEARS OF HELL | TWO FELONS WORTHY OF A CLOSER LOOK

Described by the judge who presided over his trial as a "quiet and measured" person who maintained his calm demeanour even in the face of stress, Mr Rayney sheds tears as he recounts his wife vanishing on a winter's night in 2007, years of intense investigation and speculation about his alleged involvement and his eventual acquittal.

Mr Rayney reveals intimate details of the moment he told his two daughters Caitlyn and Sarah that their mother was missing.

He also talks about his astounding reaction when he was told nine days later of the discovery of his wife's body buried in a bush grave in Kings Park.

"That was the start of this nightmare that's gone on for seven years and still hasn't finished," Mr Rayney said. "I said, 'How is that, that doesn't happen . . . it's, who would bury Corryn in Kings Park . . . it's, treat her like a, like a dog, like some sort of a gangland killing'. I said, 'How does that happen'?"

Mr Rayney describes being "gobsmacked" when identified as a prime suspect in his estranged wife's murder but says he has had unwavering support from his children.

A forensics expert who worked on the defence tells the documentary that at least two other men should have been investigated as thoroughly as Mr Rayney.