 All right, let's pivot now and go deep into the investigation where it stands tonight. A lot has gone on in the last 26 hours or so. We know the shooter identified now is 20-year-old Thomas Matthew Crooks of Pennsylvania. No military background. The gun has been traced by the ATF to being legally bought by his father. But let's take a look back to how this all unfolded, how we got to this point. ABC's Jim Ryan is with me. Good evening, Jim.