In this EDCA Civil Complaint, 2:13-cv-02242-WBS-DAD, the Hells Angels Motorcycle Club has sued rapper Young Jeezy's clothing line company, 8732 Apparel, LLP, and Dillard's department stores for copyright infringement over the use of the Hells Angels' skull logo called the "Death Head."
I'm not an intellectual property attorney, but the two logos do look very similar.
P.S. Young Jeezy's lyrics contain lots of commentary on our criminal justice system, including my favorite line from "crazy world" on his 2008 CD "The Recession": it's a crazy world when "you get more time for selling dope than murder."