do with that info whatevery you may
edit: more information from the replies that I'm not going to validate: https://twitter.com/Kosacki/status/1547315158782984192
He checked his phone at time 8:55. At 9.22 he tell his colleagues that his "wife has been shot". At 10.10 he exits the hallway.
No we have to train the cops better and get more of them, we need to increase their funding!
What that hallway really needed was more cops!
In an infinite hallway with infinite cops, one of them would mistake a shadow for a black person and kill an active shooter by accident.