Ex-NBA player Rasual Butler had multiple substances in his system at the time of his fatal crash back in January ... including alcohol, marijuana and painkillers ... according to the autopsy obtained by TMZ Sports.
As we previously reported, Butler was behind the wheel of a Range Rover -- with a female passenger -- when he lost control around 2:30 AM and crashed into parking meters and a concrete wall. Both died immediately from injuries suffered in the crash.
