The defense attorney for a Marine charged with murdering a prostitute while she was visiting Hawaii last year, said his client killed the woman in self defense after she cut him with a lipstick knife.  Thirty-nine-year-old Master Sergeant Nathaniel Cosby is charged with unpremeditated murder, and other violations. In his court-martial Monday, Lieutenant Colonel Clay Plummer said Ivanice "Ivy" Harris argued with Cosby over payment for her services and she pulled out a lipstick with a razor-type blade and cut Cosby. There was a struggle and Harris ended up dead. Cosby then disposed of her body. The Article 32 hearing continues Tuesday.