. >> abc's matt kozar has been on the scene. matt, what's the very latest? >> reporter: good morning, diana and john. we're learning more about the shooter. his name is richard shoop. police found a suicide note. and they found his body in a back room here at the mall. it likely took them a long time to find him because this mall is so big. it's still unclear why he did what he did. a sole gunman unleashes terror inside new jersey's garden state plaza mall monday night. >> it was no individual that was struck by anything, other than mr. shoop taking his own life, with the weapon that he used to do the firing inside the mall. >> reporter: police believe the gunman, dressed in black, may have also been wearing a motorcycle helmet, as he fired several shots near the in order stomach department store. investigators say they found a shell casing from an assault rifle. >> we ran in for our safety. from there on, we ran to the nearest exit. all we wanted to do was just get safe. >> reporter: no one was hurt in the shooting. >> have an opportunity to shoot people an