A 28-year-old man who was arrested in connection with a Memorial Day fight at Heeia Kea Pier that left a man in critical condition was released Friday, pending investigation.

The man was arrested Thursday night on suspicion of first-degree assault after police asked for public’s help in finding witnesses to the fight.

Officers responded to a large fight and found an unresponsive man with head injuries near the boat launch area about 6 p.m. Monday. He was taken to the hospital in critical condition.

Police said they believe one man punched the victim, who fell down and his his head on the asphalt.