James Mayhugh is scheduled to be sentenced in the case December 30th.
Prosecutors claim Mayhugh, and his cousin Hubert Mayhugh III broke into Kevin Vaughn's home in March of 2012, robbed Vaughn, then killed him. Vaughn was married to Megan Mecum at the time. Police say James Mayhugh and Mecum were having an affair.
A jury previously found Hubert Mayhugh guilty in the case, but he has not been sentenced. Megan Mecum is scheduled to go to trial next month.