Not only was he in the back of a police car, he was handcuffed in back and shot in the front.  Clever.

http://www.nbcnews.com/news/investigations/handcuffed-black-youth-shot-himself-death-says-coroner-n185016

“In a press release issued March 3, the day he died, the Louisiana State Police said Victor White III apparently shot himself in an Iberia Parish police car. According to the police statement, White had his hands cuffed behind his back when he shot himself in the back.

“But according to the full final report of the Iberia Parish coroner, which was released nearly six months later and obtained exclusively by NBC News, White was shot in the front, not the back. The bullet entered his right chest and exited under his left armpit. White was left-handed, according to family members. According to the report, the forensic pathologist found gunshot residue in the wound, but not the sort of stippling that a close-range shot can sometimes produce. He also found abrasions on White’s face.”