who said they saw him play high stakes video poker for eight continuous hours the morning of the attack. 16 hours that weekend. and what makes this so urng is milling about with the public at that hotel, out in the open, for days before the attack. david? >> matt gutman leading us off tonight. matt, thank you. and the other major development, the gunman's girlfriend, she is back in the u.s. tonight, being questioned now by the fbi. her brother telling abc news that she assured her family she has a, quote, clean conscience. but tonight, she remains a person of interest, as they now ask, how the gunman assembled such an arsenal without anyone noticing. here's abc's chief investigative correspondent brian ross. >> reporter: tonight, just 12 hours after she arrived on a htigflm ro fphth shooter's long-time girlfriend, marilou danley, told the fbi, according to law enforcement officials, that she had no knowledge of his plans or his purchase of so many guns. her lawyer read her statement after the fbi session ended.