Ronald Washington, who is one of the men convicted in the murder of Jam Master Jay, is seeking to have his guilty verdict overturned or a retrial, WBLS reports.

Susan Kellman, Washington’s attorney, argues that the government did not provide enough evidence to support the conviction. Also, she noted that her client and Jam Master Jay, whose real name is Jason Mizell, were partners in the drug transaction.

Defense attorneys also alleged that Jay Bryant, who is facing charges connected to the murder, is the actual killer. They further alleged that there’s a lack of evidence pinning Washington and his co-defendant, Karl Jordan Jr., at the scene of the crime.

In a case that took more than two decades to solve, another twist recently occurred when it was announced that prosecutors were considering a plea deal for Bryant, the Associated Press reports. 

Bryant became a suspect in the case after his DNA was discovered on a hat in Mizell’s studio in Queens, NY—the scene of the crime. 

During the high-profile trial, Bryant’s uncle testified that his nephew told him that he shot Mizell who allegedly reached for his gun. Assistant U.S. Attorney Artie McConnell argued that Bryant was “involved, but he’s not the killer.”

The prosecution team claims that Bryant snuck into the building and gave Washington and Jordan access, without buzzing the studio, so their presence would not be detected.

According to court records, Mizell’s murder was the result of a drug deal gone bad when the RUN-DMC co-founder allegedly cut Washington and Jordan out of the transaction.

“It was a brutal crime,” Assistant US Attorney Miranda Gonzalez said to the jury during the trial.

“The defendants had killed a world-famous musician in front of people they know,” she continued.

Gonzalez stated that Washington and Jordan hatched a plan to murder Mizell out of greed.

“It was an ambush. An execution,” she added. “And you’ll learn that it was motivated by greed and revenge.”

Hailed as one the most iconic rap groups of all time,  RUN-DMC, comprised of Mizell, Joseph “Rev Run” Simmons, and Darryl “DMC”  McDaniels, helped take rap music into the mainstream with several groundbreaking songs such as “Sucker M.C.'s”, "It's Like That," “Rock Box," "Walk This Way,” “Down With the King,” and many more.

Among the group’s many accolades, in 2009, they were inducted into the Rock and Roll Hall of Fame.

Following their conviction, Washington and Jordan both face life in prison.

Judge LaShann DeArcy Hall set Bryant’s trial for late next January.