BOSTON (WHDH) - Police have arrested a man caught taking photos inside the Callahan Tunnel. According to investigators, the suspect claimed it was simple photography, but police are not taking any chances. Massachusetts State Police said they found Muhammad Mamun taking photos inside the tunnel at 5 a.m. on Sunday. "How could taking pictures put me in such a situation?" Mamun said. "People take pictures of Bunker Hill, they don't get arrested. Why did I get arrested?"