Brew News: The Latest on DJ AM

Investigators say DJ AM did not commit suicide, but that his death Friday may have been caused by a tragic relapse.

DJ AM had been sober for more than a decade and clean for 4 years. But, after narrowly surviving last September’s plane crash, he reportedly became dependent on Xanax. Doctors had prescribed the drug to help him conquer his fears about flying. But the drug may have sent him back down the road to addiction.

Friends say if it was a relapse, it was very recent.

Meantime, AM’s frequent musical collaborator and fellow plane crash survivor, Travis Barker, tweeted Saturday his "brother is gone… i'll never forget everything we've been thru and every time i play the drums i'll think of you. U were an amazing friend/DJ/human being. Rest In Peace my brother, this really f***s me up."

Sources say AM’s ex-girlfriend, Nicole Richie -who hasn’t spoken publicly- is very upset.

TMZ reports the evidence strongly indicates AM’s cause of death will be a combination of crack cocaine and anxiety-related drugs.