The Montgomery County, Ohio, coroner announced Thursday that the gunman identified in the mass shooting in Dayton earlier this month had cocaine and other drugs in his system at the time of the shooting, The Associated Press reported.

Dr. Kent Harshbarger added during a press conference that a bag of cocaine was found on the body of Connor Betts, the alleged shooter. Betts also reportedly tested positive for alcohol and antidepressants.

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Police say Betts, 24, killed nine people, including his sibling, before he was shot and killed by police at the scene.

A friend of the suspected gunman who "indicated he purchased body armor and a firearm accessory for Betts" is now facing federal charges partially linked to his drug use.

Ethan Kollie is being charged with lying on federal firearms forms about drug use and illegally possessing weapons.

Kollie told agents that that he had done "hard drugs," marijuana and acid four to five times a week with Betts during 2014 and 2015.

A motive for the shooting has yet to be determined.