it's not unusual. it's one of the more troubling fact here is in pakistan that that region is loaded with militant groups. the pakistani taliban, the afghan taliban, al qaeda link groups, all of them with declared desires to kill americans. was this individual linked to one of these militant groups, or was he working alone? that's something pakistani investigators will be helping u.s. investigators find out, larry. >> larry: thanks, reza sayah on the scene, cnn international correspondent in islamabad. >> larry: three of the former suspect's former neighbors join us next. one lived next to him, one across the street, one in the house behind him. they knew he didn't like sunlight. what else caught their attention? that's next.