Charles Whitman of the "Texas Tower" shootings, was 'eventually' shot by police & citizens after a long, extended effort to get to him... they 'may' have saved a few, though most people were well-hidden by the time they got to him.

Th 19 year old kid in the Wichita Holiday Inn shooting that I mentioned earlier (very similar to the Texas Tower thing) was also eventually shot & captured after police managed to get to the room beside the room where he was.,,,he 'only' killed 3 and injured 8.

That one, BTW, is missing from this list... which may list only 4 or more deaths)