73-year-old man pleads not guilty in 1979 death of his wife’s lover

The 73-year-old millionaire accused of killing his wife's lover almost 30 years ago appeared in court briefly Tuesday afternoon to declare that he isn't guilty in the killing.

At his arraignment in District Court, David Morgan stated that he understood the charges against him and waived his right to a speedy trial.

Morgan, who is out of custody on $100,000 bail, declined to comment after the hearing.

Morgan was arrested in January 2007 in Arizona and charged with killing Gabriel Vincent, who is believed to have been slain in 1979. Police believe Morgan also was involved in the disappearances of his wife, Marie, who went missing in 1980; his girlfriend, Diana Leone, who vanished in 2000; and a former business associate who disappeared in 1982.

One reason police believe Vincent, Morgan and Leone are dead and didn't run off to live elsewhere is that they never contacted friends or relatives after they went missing.

In January 2007, Las Vegas police dug up a $4 million property Morgan owns in an attempt to find Vincent's body. The body was not located.

The case broke after police found a former employee of Morgan's who told authorities that he saw Morgan shoot Vincent and helped bury his body in 1979.

The employee, Fred Hackett, told authorities in 2006 that he and Morgan buried the body near Mount Charleston. About six months after the slaying is alleged to have occurred, Hackett got into a fight with Morgan and they never spoke again.