It is. I'm honestly surprised she didn't kill more while expending that many rounds and having that much time. They've already stated she had mapped out the building and had planned it for months ahead of time.
The guy who stopped the shooting at a mall last year did so within 15 seconds of the perp opening fire, and even within that 15 seconds, there were three people killed and two others wounded by the perp.
The teachers and kids followed protocol and had locked themselves into their rooms. The only people killed were those that were caught out in open areas (hallways, etc.).
She didn’t kill more because that one child set off the fire alarm which caused all the children to get out of the building. Audrey killed the child who set off the alarm, but that child saved so many others.
Depends on the motive. That she positioned herself to fire upon arriving cop cars indicates she wasn’t that interested in competing with other school shooters for the highest number of victims, she was motivated by a noncompetitive desire to kill cops. Other shooters were on killing sprees to get attention, were angry, suicidal, drug influenced, etc.
But she may be an anarchist, with very political motivations. Her real targets were probably not random kids, but perhaps authorities, the police. If that is the case, the kids were nothing more than a means to an end, bait, the aim being to lure lots of police into rushing headlong into her field of fire. Maybe in her mind she was trying to go out as a leftwing hero, “righteously aiming to kill fascists.”