RedactedNarrative: On July 4, 2021, at approximately 0357 hours, Alaska State Troopers were notified that an adult male fell off the back of a boat in Big Lake and did not resurface. The operator and other occupants of the boat were not able to locate the man after searching the area. The Mat-Su Borough EMS Dive Team, MAT+SAR, and Alaska Dive Rescue responded to Big Lake to assist with the search.  The operator of the boat had not been consuming alcohol, but the rest of the occupants had been drinking. At approximately 1700 hours, Alaska State Troopers suspended recovery efforts for the day after no new clues were discovered about the male's location. Troopers will resume recovery efforts tomorrow morning at 0800 hours.