Crooks carried out the attack from a rooftop of a nearby building and was killed by Secret Service snipers shortly after he opened fire.
Investigators have since found materials for explosive devices in his car and potentially at his residence in Bethel Park, Pennsylvania.
They have not, according to authorities, found any kind of manifesto or motivation for the attack.
Crooks was not under FBI surveillance or investigation prior to the attack.
abclinkhis profile looks like most low-mid socioeconomic kid without a defined political agenda.
motive remains unknown.
I'm sure they'll be debriefing ALL his contacts over the last decade to try to work out some political angle.
