Louisville Shooter's Brain Tested for CTE After Mass Shooting

The family of Louisville shooter Connor Sturgeon plan to test his brain for CTE, a rare condition that can be caused by repeated concussions and result in aggressive behavior, in search of an answer for why he killed five colleagues last week in a workplace rampage. Sturgeon had legally purchased his AR-15 rifle days earlier, passing background checks despite the fact he'd been seeking treatment for anxiety and depression. His family were at a loss over what could have driven him to commit such violence.