BS Narrative. If I were a cop responding to an active shooter at my child's school, of course that child would be my priority, but that doesn't imply any dereliction of duty. As Rockinbbar stated, that video appears to be after the events with police trying to keep some sense of order in a chaotic situation. There's police tape up, for pete's sake, With an active shooter, pretty sure they wouldn't call time out to put up tape.
No, the leftists, in their all-obsessive desire to always find a way to criticize cops, come up with the framing to tell the brainwashed masses who only read the headline and use no critical thinking that 'cops failed'. The OP's article itself admits that there is no way to know the timeline of the videos that are posted.
