they found multiple weapons there. again as well as molotov cocktails and explosives. that raising the question about whether anyone knew this. whether this was suspicious in anyone's mind that the shooter knew and why they didn't call law enforcement. we also know from that top fbi agent that there are now approximately 50 investigators here working with the atf, with local law enforcement trying to go through every bit of evidence to try to piece together that motive. >> and josh, you have confirmed that in 2016, u.s. customs officers actually found this memo book in the shooter suspect's baggage that was filled with just hate-filled messages about his employer, is that right? >> yeah, this is incredible reporting yesterday. first reported by "the wall street journal," confirmed by our cnn colleagues at the washington bureau that back in 2016, the shooter in this mass attack was actually detained by customs officials as he returned to the united states from the philippines. and during screening of his