Any taped off crime scene will be manned by officers at the perimeter.

They won't bother taping off the scene if the shooter is still active. They would be engaging as they are trained. No way a bunch of Texan cops stood idle.

Hey Jimmy! Yeah Bill? It sounds like the shooter is in there. Why don't you grab some crime scene tape and block off this area while the shooter keeps shooting. Copy that Bill!

This is being blown out of proportion and misinterpreted.

Edit: Interesting responses to my comment. Felt like I was back at Reddit.

Any taped off crime scene will be manned by officers at the perimeter.

They won't bother taping off the scene if the shooter is still active. They would be engaging as they are trained. No way a bunch of Texan cops stood idle.

Hey Jimmy! Yeah Bill? It sounds like the shooter is in there. Why don't you grab some crime scene tape and block off this area while the shooter keeps shooting. Copy that Bill!

This is being blown out of proportion and misinterpreted.