Nearly a quarter-century after rap star Jam Master Jay of Run-DMC was shot to death, a man admitted in court Monday to a role in a killing that stymied investigators for decades. Jay Bryant pleaded guilty to a federal murder charge, telling a judge that he helped other people get into a recording studio so they could ambush the DJ, born Jason Mizell. The 52-year-old’s admission brings some closure — but also adds complexity — to a knotty case. Bryant didn’t name the other people with whom he acted. But a jury in 2024 convicted two other men, Karl Jordan Jr. and Ronald Washington, yet a judge subsequently cleared Jordan. Washington has also challenged his conviction.