A prosecutor says surveillance videos will help show that a former college soccer coach killed his ex-girlfriend's 12-year-old son in New York in 2011.

Opening statements were delivered Monday in the murder trial of Oral "Nick" Hillary.

Onondaga County District Attorney William Fitzpatrick, who is helping his counterpart in St. Lawrence County, told the judge hearing the case that outdoor surveillance videos in the village of Potsdam show Hillary stalking Garrett Phillips before the boy was strangled on Oct. 24, 2011.

Defense lawyers say the prosecution lacks physical evidence.

Hillary was the men's soccer coach at Clarkson University. He and his daughter had lived with the boy's mother until the relationship ended in summer 2011.

His supporters claim authorities in the largely white community are unjustly pursuing a black man.