and how he got it. >> this is the exact type of weapon we've seen in numerous incidents in the united states over the years when people try to cause mass loss of life and carnage. this is a weapon of war, the same type of weapon the military would use on the battlefield, now easily obtained in the united states. the suspect purchased the weapon in the state of nevada just before the attack and brought it to california. authorities have ruled out that this was purchased illegally. the other question is was this person known to law enforcement. we're told he was not what they call a prohibited purchaser with this weapon, which means he wasn't a violent felon. there were no warning signs from the legal side to stop him. the question will be whether there were others who knew him who could have come to authorities beforehand. >> that has to be the last word, josh, thank you, wesley, appreciate it as well. next, everything to watch