A day after Run-D.M.C.'s Jason "Jam Master Jay" Mizell was laid to rest in Queens, N.Y., the surviving members of the group -- Joseph "Run" Simmons and Darryl "D.M.C." McDaniels -- were joined by hip-

A day after Run-D.M.C.'s Jason "Jam Master Jay" Mizell was laid to rest in Queens, N.Y., the surviving members of the group -- Joseph "Run" Simmons and Darryl "D.M.C." McDaniels -- were joined by hip-hop artists and music executives to formally announce the establishment of The Mizell Children's Fund.

With Mizell's widow, Terri Corley-Mizell, the coalition of artists and executives -- which includes Island Def Jam Music Group co-founder Russell Simmons, Sean "P. Diddy" Combs, Island Def Jam Music Group CEO Lyor Cohen, Chuck D, Doug E. Fresh, and the Beastie Boys' Adam Horovitz, among others -- plan to raise funds for the Mizell family and aid in the capture of Mizell's killer.

Joseph Simmons also announced that the group has officially retired. "As a tribute to the positive legacy of Jam Master Jay, we started together and we want the Run-D.M.C. legacy to always reflect the three of us together," he said.

Mizell was shot to death last Wednesday in his Queens recording studio. He was 37.