ORLANDO, Fla. — Trayvon Martin’s autopsy shows he had marijuana in his system the night he was killed by neighborhood watch volunteer George Zimmerman, and a gunshot to his chest came from close range, according to nearly 200 pages of previously undisclosed documents released Thursday.

At least one investigator wanted to charge Zimmerman with manslaughter but was overruled, according to the documents, which are shedding new light on a case that has raised questions about racial profiling and “stand your ground” laws.

The investigator, who was on the scene after the shooting, wrote on March 13 that the confrontation should have been avoided. That report came nearly a month before Zimmerman was arrested.

The documents, photos and video were turned over by prosecutors to defense attorneys earlier this week before they were released to the media. Included in the many witness interviews were accounts by an acquaintance of Zimmerman’s who said he’s racist and a co-worker who said Zimmerman bullied him and mocked him with an exaggerated Middle Eastern accent.

The autopsy says medical examiners found THC, the psychoactive ingredient in marijuana, when they tested Martin’s blood and urine.

A police report shows the 17-year-old had been shot once in the chest and had been pronounced dead at the scene. The autopsy says the fatal shot was fired from no more than 18 inches away.

Also in the package is a photo showing Zimmerman with a bloody nose on the night of the fight. A paramedic report says Zimmerman had a 1-inch laceration on his head and a forehead abrasion.