the shooting including this video that we're about to play. and i warn you, this is really hard to watch. h. who's shooting? >> it's okay. it's okay. hey, are you okay? i got you. >> that video my goodness, the suspect used an ar-type assault rifle. but officials say he failed a background check and shouldn't have been able to own a gun in the first place. this comes as a series of new gun laws went into effect yesterday loosening gun restrictions in the state of texas. nbc's garrett haake has the latest. all right, garrett, let's start with what have we learned today about the gunman? >> reporter: well, stephanie, we learned that it appears the proximate cause, the immediate cause of this shooting may have had something to do with the suspect's firing earlier in the