An off-duty East Baton Rouge Sheriff's deputy was killed in a motorcycle crash in Geismar Friday afternoon, State Police reported.

John DePedro Jr., 36, of the Special Community Anti-Crime Team, was the deputy who was killed in the crash, said Casey Rayborn Hicks, a spokeswoman for the Sheriff's Office.

State Police began investigating the fatal crash, which occurred after noon on Friday. They learned DePedro was driving his Harley-Davidson motorcycle south on Highway 30  when he tried to pass another vehicle in a no passing zone, Louisiana State Trooper Taylor Scrantz said in a news release.

DePedro struck a speed hump in the center turn lane, Scrantz said, and was thrown from the motorcycle, which continued until it hit a northbound Toyota Tacoma. 

Though wearing a helmet, DePedro sustained serious injuries and died at Our Lady of the Lake Ascension. The driver of the Tacoma was uninjured.

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"He was a dedicated public servant and will be greatly missed," East Baton Rouge Sheriff Sid Gautreaux said in an email to his team.

DePedro served the East Baton Rouge Sheriff's Office for nearly 11 years, spending eight working at the prison. He leaves behind a wife and two children.

The Louisiana State Police investigation is ongoing.

Follow Jacqueline DeRobertis on Twitter, @jmderobertis.