RedactedNarrative: On July 3, 2021 at 2:46 am (Operator) was headed south down the Lower Flats toward the Upper Grand River in a 2020 18' Havoc Sterndrive Vessel with three other passengers.  Operator and his passengers were in the process of frogging to which they were spotlighting the opposite bank while underway at a high rate of speed.  While focused on the spotlight on the opposite bank, his vessel collided with a protruding tree branch from the bank located on the vessel's starboard side.  The branch first made contact with occupant, who was seated at the bow of the boat and was able to block the smaller of the branches. The larger of the branches impacted victim's in the head, who was seated at the stern starboard side of the vessel and fell against the motor as a result of the impact.  After the impact, Operator operated the vessel back to Jack Miller's Landing and contacted 911 for assistance and victim was then brought to Our Lady of the Lake Hospital for treatment of his head injuries.  At 2:56am. I Agent was contacted by Sgt that he had been notified by dispatch that a boating incident had occurred with one known injury.  I then responded to the scene of the boating incident to make contact with the operator of the vessel and the onsite passengers involved.  After interviewing the subjects involved, they all collaborated on the events above that led to the incident.  After finishing the interview with the operator and passenger, I made contact with the single injured passenger at Our Lady of the Lake in Baton Rouge; He was found to have suffered a large laceration and skull fracture from the impact of the tree branch.  PFD's were found to be present in the vessel but not worn at the time of the incident and the kill switch was attached to the operator at the time of the incident.  Drugs and alcohol were not present.