Auburn City Councilor Leroy Walker, whose son was killed in a mass shooting Wednesday night in Lewiston, wipes away tears Sunday while being comforted by participants at a trunk or treat event at Anniversary Park in New Auburn. Walker, who organized the event, said cancellation was not an option. “It meant too much to me,” Walker says. Auburn Mayor Jason Levesque is at right. Ben McCanna/Portland Press Herald

Auburn City Councilor Leroy Walker, whose son was killed in a mass shooting Wednesday night in Lewiston, wipes away tears Sunday while talking to reporters at a trunk or treat event at Anniversary Park in New Auburn. Walker, who organized the event, said cancellation was not an option. “It meant too much to me,” Walker says. Ben McCanna/Portland Press Herald

Auburn City Councilor Leroy Walker, background left, and Mayor Jason Levesque greet participants Sunday at a trunk or treat event at Anniversary Park in New Auburn. Walker, whose son was killed in a mass shooting Wednesday night in Lewiston, said cancellation of the event was not an option. “It meant too much to me,” Walker says. Ben McCanna/Portland Press Herald

Auburn City Councilor Leroy Walker, whose son was killed in a mass shooting Wednesday night in Lewiston, receives a hug Sunday from Tessa Cottrill, 5, dressed as a cat, during a trunk or treat event at Anniversary Park in New Auburn. Walker, who organized the event, said cancellation was not an option. “It meant too much to me,” he says. Auburn Mayor Jason Levesque is at right. Ben McCanna/Portland Press Herald