Enrique Marquez, a friend of San Bernardino shooter Syed Farook, told investigators that he and Farook had previously built pipe bombs, but not the ones found at Farook and Tashfeen Malik's house or the ones that supposedly did not go off at the scene of the shooting. Marquez, who voluntarily submitted to a several-day-long interview, represented himself and Farook as hobbyists toying around with the bombs, officials told CNN. He supposedly boasted that if he had built the pipe bombs found at the scene of the shooting, they would have gone off. Marquez is a person of interest in the mass shooting investigation because he apparently bought the rifles Farook and Malik used. He has not been charged with any crime.