[RC one]

I considered that. But there's no national centralized database of long guns. Tracing long guns back to the point of sale is a slow process. he would have had time to leave the country (for example, to the Philippines to be with his girlfriend whom he had just sent $100,000)and if he was paid enough to make the deal, that might have been his plan. ISIS is well funded. They could have offered (or baited him with) millions.

This guy doesn't seem like ISIS. He seems like the kind of guy that would sell guns to ISIS though. and ISIS seems like the kind of group that would gun down a bunch of Americans and then leave a dead patsy behind to throw the cops off the scent just long enough to escape.

There are multiple reports of multiple shooters. There was a significant amount of time between the start of ther massacre, the end of the massacre, and the time the SWAT team entered the room to find the suicided body. There are also reports on youtube of a woman in the crowd warning people that they were all going to die. If the FBI had similar suspicions, they probably wouldn't admit it for a number of reasons.

I think it's entirely possible that the true killer(s) are roaming free right now.

[PIF]

According to one guy on cable trying to correct the record: the floor was guarded by several local cops who had gone to the floor below but were alerted by the security guy who was shot. The shooting had ended 12 minutes prior to the cops and security guard’s arrival - they were alerted by the car valets on whom the glass from the windows fell as to the possible floor and location of the shooter. The cops held their positions blocking access and egress to the 32nd floor until the swat team arrived much later.

Still, 12 minutes is a lot of time to make an exit.