Traces of THC found in Trayvon Martin's system: autopsy

Florida teenage shooting victim Trayvon Martin had traces of marijuana in his system when he was killed by neighborhood watch volunteer George Zimmerman, according to case documents released on Thursday.

The medical examiner's report was among hundreds of pages released in connection with the Feb. 26 shooting that triggered civil rights protests as well as a debate over guns, self-defense laws and race relations in America.

The report showed traces of THC - an ingredient found in marijuana - in Martin's blood plus a positive test for cannabinoids in his urine.

The documents also include a photocopy of a camera phone photograph of Zimmerman taken at the scene before he received medical attention.

A Sanford, Fla., police officer said that "Zimmerman appeared to have a broken and bloody nose and swelling of his face," which would support Zimmerman's contention he feared for his life in his struggle with Martin.

Zimmerman has pleaded not guilty to a second-degree murder charge and says he killed the 17-year-old Martin in self-defense.)