MONTREAL -- A Montreal cop has been fired after pleading guilty to running a 17-year-old driver off the road in a fit of rage in 2011, then punching the injured boy.

Patrick Delsame, a 24-year veteran of the Surete du Quebec, became enraged at the teen driver who was weaving around traffic. Driving an unmarked police van on Hwy. 132 in St-Lambert, Delsame tailgated the car at high speed, chasing it down before ramming it from behind. The car slammed into a concrete wall.

The teen was injured inside his destroyed car when Delsame flashed his badge and punched the boy, witnesses said.

Delsame pleaded guilty to dangerous driving in 2013 and was fined $2,000.

An ethics committee said Delsame suffered from attention deficit disorder that made him vulnerable to impulsivity and rapid mood changes. The committee said he had decided on his own to discontinue a medication and to cut another in half.

Delsame did not challenge the dismissal.

