obtained by cnn. we are hearing this from two different sources that the fbi is looking at this. they're trying to build a profile. you heard the frustration in the sherch's voice. they're trying to step into the mind of this gunman. before the gunman unleashed his murderous assault on an innocent concert crowd, he called himself the biggest video poker player in the world. gambling up to a million dollars in a single night, overnight, sleeping during the day, prescribed valium for anxiousness. these are the killer's own words as he testified in 2013 in his lawsuit against a cosmo positively tan hotel in las vegas where he slipped in the walkway. he says he moved from las vegas casino to casino, at one point staying upwards of three weeks out of aa month. a high roller, his hotel stays were comped 95% of the time. bets ranged from 100 to 150 each