A grand jury in Prince George’s County, Maryland, has indicted Sgt. Robert Warrington of the Bowie Police Department on charges of attempted second-degree murder, first-degree assault, reckless endangerment and misconduct in office, Prince George’s County State’s Attorney Aisha Braveboy and Bowie Police Chief Dwayne Preston announced.

The Washington Post reports the incident unfolded on the morning of Sept. 12 while Warrington was on patrol and stopped to help who he thought was a stranded driver, Preston said in a statement last month. For reasons still being investigated, Warrington aimed and fired one shot at a man who had crossed the median and walked past him after a brief conversation, officials said. The man had his hand in his jacket pocket. No weapon was recovered from the man, officials said.

No one was injured in the shooting, but a passing car was struck, officials said.

“I support the grand jury’s independent, objective process and decision,” Preston said. “We would ask that the public reserve judgment until the process has been completed.”