The Boston Herald reports that a jailed career criminal has confessed to participating in both the 2002 murder of Run DMC’s Jam Master Jay and the unsolved 1995 killing of a close associate of rapper Tupac.

The new information surfaced as part of the federal robbery trial this month of Ronald “Tenad” Washington, who says he now expects to be charged as an accessory in the shooting death of Jam Master Jay, born Jason Mizell, and for the murder of Randy “Stretch” Walker, who rapped with Tupac on the Thug Life album, “Volume 1.”

A female witness told authorities that Washington has confessed to details of both murders.

“It’s all lies,” he tells the Herald from a Brooklyn prison. “She’s telling them that I was mad at Jay because he is doing better than I am, that I killed Stretch because he owed me something and I wanted it. She is making up lies because they threatened to deport her.”

According to the Herald, Washington is expected to be named in the Mizell and Walker cases when the federal government announces its ongoing federal investigation that promises to expose the extent of violence in the rap industry. Several law enforcement officials say that in the coming months they will unveil a sweeping indictment charging multiple rap artists for a number of violent acts.