What duo  was an American rapper and record producer apart of , who had a guest appearance in  the second album by American hip hop duo 1982 ?
Havoc (musician) Kejuan Muchita (born May 21, 1974), better known by his stage name Havoc, is an American rapper and record producer. He was one half of the hip-hop duo Mobb Deep.
Walking with a Panther Walking with a Panther is the third studio album by American hip-hop artist LL Cool J, released June 9, 1989, on Def Jam Recordings. While his previous album "Bigger and Deffer" (1987) was produced by The L.A. Posse, Dwayne Simon was the only member left of the group willing to work on "Walking with a Panther", as other members, such as Bobby "Bobcat" Erving, wanted a higher pay after realizing how much of a success the previous album had become. Def Jam, however, refused to change the contract which caused the L.A. Posse to leave. "Walking with a Panther" was primarily produced by LL Cool J and Dwayne Simon, with additional production from Rick Rubin and Public Enemy's production team, The Bomb Squad.