The Los Angeles County deputy district attorney who attended Marilyn Monroe's autopsy in 1962 has declared he's almost certain the movie icon died of a poisoned enema.

JOHN MINER has always maintained the actress was injected with a lethal dose of Nembutal, and is now backing up his medical overview with comments he claims Monroe made to her therapist RALPH GREENSON in the weeks leading up to her death.

Greenson allowed Miner to listen to Monroe's outpourings in his office as long as the lawman swore never to reveal what he had heard. The doctor later destroyed the tapes.

But now, years after Greenson's death, Miner is revealing what he heard on the tapes, which led him to believe that Monroe was among many stars of the late 1950s and early 1960s who used enemas for sexual pleasure.

As part of a Playboy magazine expose, Miner reveals, "(PETER) LAWFORD (late Rat Pack star and socialite) had enema sex parties at his Malibu house. She (Monroe) refers to one of them, at which she had the interesting experience of allegedly having the COUNTESS DU BARRY's equipment used on her."

But Miner debunks the myth that Monroe accidentally killed herself by administering her own lethal enema on the night she died.

He adds, "If she administered it, the fluid would have been absorbed as it came in. An effect of Nembutal, when it absorbs, is to render the user unconscious... she would have been unconscious with all this stuff running out of her before enough of it was absorbed to kill her."