BBC NEWS wrote:A member of Eminem's rap collective D12 has been killed in a nightclub shooting in Detroit.
Proof, whose real name was Deshaun Holton, was shot at a club on Eight Mile Road, made famous in Eminem's autobiographical film 8 Mile.
He was a longtime friend of Eminem and had acted as his best man at his wedding in January.
A publicist for D12's record label Interscope said arrangements were being made for a memorial service.
Police said that two people had been shot in the head, one fatally, after an argument broke out at the CCC nightclub.
Movie role
Proof originally put forward the idea of forming D12 with friends he met at Detroit clothes store Hip-Hop Shop.
Despite Eminem's huge solo success he continued to record the group, which released albums D12 World and Devil's Night.
The group scored a number two hit in the UK with Purple Hills in 2001 - which had its name changed from Purple Pills to ensure radio play - and My Band in 2004.
Proof made an appearance in the critically acclaimed 8 Mile and is credited on the award-winning soundtrack.
His best man duties came at Eminem's second wedding to Kim Mathers. The pair have since announced they are to divorce again after less then three months of marriage.
D12 member Obie Trice was recently shot at while driving in Detroit. He was wounded in the attack, while his girlfriend remained unhurt.
My heart goes out to the family and friends of Deshaun Holton, being at a funeral of a close friend today, I've never understood the pain of loosing someone till now. May he rest in peace ...