Bystander-Turned-Hero Spotted Subway Shooting Suspect on NYC Street, Worried ‘This Guy Is Gonna Do It Again’

Zack Dahhan, a witness who reportedly notified police of Frank James's whereabouts, gives an interview after leaving the 9th Precinct where James was being held in police custody for his connection to Tuesday's shooting at the 36th Street subway station. Michael M. Santiago/Getty Images via TNS

By Brittany Kriegstein and John Annese From New York Daily News

NEW YORK—Zack Dahhan had one thing on his mind when he saw suspected subway shooter Frank James walking along an East Village sidewalk Wednesday afternoon: If someone doesn’t stop him, he’ll hurt more people.