RedactedNarrative: Watercraft #1 was traveling east on the lake heading toward the east shoreline. Operator #1 was traveling above plane (wake speed) within 150 feet of shore. Watercraft #1 collided with the victim, who was swimming in the lake about 50 - 75 feet from shore. Operator #1 tried an evasive 180 degree maneuver, but the back of the watercraft struck the victim in the back of the head. The maneuver caused the passenger on the watercraft to be thrown in the water (no injury). Operator #1 and friends and family helped bring the victim to shore where he was turned over to medical personnel. He was transported to the hospital with a laceration to the back of the head and internal bleeding on the brain. Operator #1 was observed for alcohol and drugs but showed no signs of impairment. Watercraft #1 did not have current registration. The operator was cited for reckless operation and also for operating at greater than slow no-wake speed within 150 feet of shoreline and also a swimmer. The owner was cited for lack of valid registration.