He was going for DeLay first. But this being a reality-based DC, security knew the second he brought the gun inside and he had to kill guards to get past the entrance. The city reacted with shock and horror (and a building lockdown) as opposed to this fantasy DC where everyone was like "eh, the gun was unloaded anyway."

I remember when it happened. Trust me, no witness was allowed to swan out and get dinner and come back.

just don't go for true-crime stuff

Turns out, neither do I unless it's historical forensics. But part of the job perk is being able to try a whole bunch of stuff I wouldn't ordinarily read to see if I like it. (In this case, no.)