He did! Almost everyone in the school did, this is why help came so quickly! The 911 line even said for them to avoid calling more than once, because so many reports about the same case would mess up with the communication and that the shooter maybe would hear they talking.

Why you people fall so hard to understand this?

I mean…I would have thought the very fact that this shooting was able to happen in the first place would have made you lose your faith in humanity. Apparently not.