(CNN) -- Woody Harrelson defended his clash with a photographer at a New York airport Wednesday night as a case of mistaken identity -- he says he mistook the cameraman for a zombie. The TMZ photographer filed a complaint with police claiming the actor damaged his camera and pushed him in the face at La Guardia Airport, according to an airport spokesman. "We're looking into this allegation and if it's warranted, we'll turn it over to the proper authorities," said Port Authority of New York and New Jersey spokesman Ron Marsico. The photographer, who was not identified, captured the encounter...