Larry Jaques wrote:

: If an armed person could have gotten a shot off into the killer before
: he killed all those people, it would have been LESS of a slaughter.

That's undoubtedly true (as true as "If a meteorite had hit the killer before
he killed all those people, it would have been LESS of a slaughter"), but
of course thinking that an armed bystander would have actually done this
well is a fantasy.

Here's a quite good piece published in the Tucson Citizen:

http://tucsoncitizen.com/mark-evans/archives/409

Bottom line: even well-trained police officers don't have a very
good hit rate, and it gets worse with multiple participants.

-- Andy Barss