A standoff that lasted more than 14 hours ended peacefully this afternoon when a gunman who barricaded himself into his house in the 25000 block of Wick surrendered to police. Shortly before 2:30 p.m. police and the Downriver Mutual Aid SWAT team brought in an excavator with plans to bring down part of the house, which was believed to have been the final convincing factor that brought the standoff to an end. Taylor Police Chief Mary Sclabassi said communications with the yet-unnamed gunman, a man in his early 20s, had been ongoing since police were first called to the scene at 11 p.m. yesterday when gunshots were heard.