country? abc s senior national correspondent matt gutman is back in las vegas tonight with what he found. reporter: investigators have poured over endless surveillance videos of stephen paddock toting his deadly stockpile, but tonight, are no closer to determining his motive in the massacre. by all accounts, stephen paddock was an unremarkable man, whose movements leading up to october 1st didn t raise any suspicion. reporter: answers lost when paddock killed himself after firing at police through this door. investigators now know his savings had plummeted, from $2 million to half a million dollars. in the wake of the tragedy, there was pressure to ban bump stocks, which enable a semiautomatic weapon to fire continuously like a machine gun. tonight, 12 months later, bump stocks remain on sale for less than $150. do you still feel pain? oh, yeah. reporter: because you still have that shrapnel in your body? right. reporter: todd wienke was hit three times while shielding os