He reportedly drove drunk at roughly 80 mph through a no-wake zone, killing a woman and injuring her husband. As officers arrived at the scene, they found Stevenson’s pontoon run aground on the riverbank nearby. ALERT: Prolific DUI driver decapitates a woman when he was allegedly drunk driving a pontoon boat 80 MPH in a no-wake zone. Richard Stevenson, 45, was seen flying across the Fox River in Illinois in his 30-foot pontoon boat, expected to be traveling 80 MPH. According to security footage from a home along the river, Stevenson’s speeding pontoon reportedly headed south before moving north almost two hours later.