door-to-door went falletti and his team of investigators. she was having trouble sleeping that night. as seoul was a week in the wee hours, watching tv in her living room. >> at some point she believes she heard what was a gunshot. and she believed that was sometime before the fire trucks and the police officer showed up in front of the seacat residents. >> exactly when each of those things happened, she couldn't say for sure. but, reviewing the tv show she was watching, she could tell them which scene was playing when she heard that gunshot. and that's how the kbi was able to determine the gun went off long before brett called 9-1-1. >> we believe it was about 30, 35 minutes prior to mr. seacat calling 9-1-1. was when she heard that gunshot. >> to do something? >> right. >> the atf's who discover the fire was not simply on the matter of lighting the bed on fire. >> was that where the fire was started? >> in my opinion, there were multiple fire started on the second floor of the residents. >> interesting. but it didn't rule out the possibili