Authorities also zeroed in on a man name Michael Beard, who had recently been fired from one of Clayton's companies. Phone records revealed that Clayton and Beard had been in frequent contact with each other, which is unusual since he was no longer an employee. It turns out Beard was the person Clayton called during the poker game the night Kelley was murdered.

When picked up by police, Beard immediately confessed and claimed he was paid $10,000 by Clayton to kill Kelley. Later Beard would change his story, instead telling authorities that while he was told to burn down the house Clayton shared with Kelley and their two children, he never showed up. His jury didn't buy it and, like Clayton, Beard was also found guilty and received a life sentence.

Catch this episode of Dateline on June 24 at 10 p.m. ET on NBC.