The New York Post has more details on 50 Cent, the protege of slain DJ Jam Master Jay of Run DMC. They talk about his bitter fued with Ja Rule that dates back to 1999 after 50 said to Source magazine, “[Ja Rule] got robbed, and he seen me with who robbed him. From then on, he treated me very differently.” Before last Monday’s record release party for ‘8 Mile’ at Discotheque, Eminem’s manager Paul Rosenberg and Shady Records A&R man Mark Labelle demanded that armed guards be allowed inside the club for 50 Cent’s performance. The Discotheque said no so 50 Cent waited in his limo until performance time, before doing a short set. All this has some cops speculating on a link to Jay’s murder.