everybody wanted to play with mary. >> and one of her occasional playing partners was dwight jones. eve, that for reasons yet unknown, dwight murdered mary and her boyfriend, bryon thomas, in their home. remember that .22 police observed dwight tossing? police later learned it belonged to the fountain hills couple. mary and bryon had been killed with their own weapon. there were now six dead, and dwight jones was still not in custody. but investigators had a good idea where to find him. >>> coming up -- finally, a killer surrounded. >> they carefully and quietly started to evacuate the hotel. >> he began firing at them. somewhere between seven and eight rounds were fired. >> when "dateline" continues. hi susan! honey? yeah? i respect that. but that cough looks pretty bad... try this robitussin honey. the real honey you love... plus the powerful cough relief you need. mind if i root through your trash? now get powerful relief with robitussin elderberry. wondering what actually goes into your multivitamin? at new chapter, its' innovation, organic ingredients, and fermentation. fermenta