Nashville School Shooter's Legal Gun Purchases Raise Concerns.

The Nashville school shooter legally purchased seven firearms from five local stores over the past few years, using three of them in Monday's attack. The shooter's parents were unaware of the purchases and believed their child only had one weapon, which had been sold. The shooter had been receiving treatment for an "emotional disorder" that had not been reported to authorities. Tennessee does not have a "red flag" law to remove weapons from a person. The shooter had planned the attack and may have had other targets in mind.