Elderly Conman Confesses He Killed 4 During Career as Motivational Speaker

June 10, 2010— -- An elderly conman who had claimed he gave up his life of crime to be a motivational speaker and author has confessed to murdering four people more than 30 years ago.

Edward Edwards, who was once on the FBI's Most Wanted list, is confined to a wheelchair these days and breathes with the help of an oxygen mask.

The ailing 76-year-old self-described grifter, who is suffering from diabetes, admitted Wednesday that he killed a young couple in 1980. He also agreed to plead guilty on Friday to the murders of an Ohio couple in 1977.

Edwards' attorney, Jeffrey De La Rosa, said he isn't clear what drove his client to kill and said he was unsure if more details surrounding the homicides will ever be made public.

"Whatever he's told me about these cases remains with he and I," De La Rosa told ABC News.

Edwards, originally from Louisville, Ky., was arrested last July after DNA tests connected him to the murders of the Wisconsin couple. Tim Hack and his giflfriend Kelly Drew, both 19, disappeared after attending a friends wedding reception in August 1980.

Their bodies were found weeks later in a wooded area where investigators believe they had been stabbed and strangled.

Edwards first confessed to murder in April when he admitted shooting Bill Lavaco, 21, and Judith Straub, 18, and leaving their bodies in an Akron, Ohio, park in August 1977.

An Ohio grand jury indicted Edwards Wednesday on two counts of aggravated murder in Lavaco and Straub's deaths, and prosecutors said they plan to seek two consecutive life sentences for those murders.

Edwards also signed a deal agreeing to plead guilty to all four homicides and entered his plea to Hack and Drew's deaths in a Wisconsin courtroom. In Wisconsin, he faces two mandatory life sentences.

Edwards practically bragged about his criminal life. In his 1972 autobiography "Metamorphosis of a Criminal," Edwards wrote that he spent his early years being beaten by nuns in an orphanage. When a nun asked him what he wanted to be, he told her, "'Sister, I'm gonna be a crook, and I'm gonna be a good one."