A man already serving life in prison for a murder in Georgia is asking to withdraw his guilty plea in the 2007 killing of his roommate at a Delaware mobile home park.
Jason Slaughter pleaded guilty in January to second-degree murder in the death of 22-year-old Christopher Masters.
A judge has scheduled a hearing Thursday on Slaughter's request to withdraw his plea.
Slaughter was found shot outside Masters' home, and Masters was found dead inside. Slaughter told police they had been shot in a home invasion.
Georgia police contacted Delaware authorities in 2010 after charging Slaughter and his wife in a fatal shooting, for which they both were convicted of murder.
Authorities have said Slaughter was the beneficiary of life insurance policies on both the Georgia and Delaware shooting victims.