An assistant Crown attorney in Ottawa has been charged with impaired driving after a crash on Highway 417 early Saturday morning.

Matthew Humphreys, 35, has also been charged with operating a vehicle with a blood-alcohol level over the legal limit.

According to Ontario Provincial Police, Humphreys crashed a pickup truck into a parked sign truck near Metcalfe Street around 2:22 a.m. Saturday.

No one was injured.

The Ministry of the Attorney General confirmed he's an assistant Crown attorney.

Humphreys has been involved in a number of high-profile cases. He prosecuted the case of Sommit Luangpakham, who was convicted of dangerous driving causing bodily harm after he struck five cyclists riding on March Road in July 2009.

Humphreys is set to appear in court Jan. 26, 2016.