Wow. Do you work for CNN or Fox News? Because you just managed to take everything out of context and then spin it on its head. Bravo.
Holmes was depending on smoke, darkness, and a panicked mob to allow him to rack up his bodycount, not any sort of superman shooting skill, or nerves of steel or lighting fast reflexes, or darkvision....
There is an excellent chance that any return fire would of put Holmes down quickly or sent him fleeing, especially if it was an armed citizen with some real skill. Holmes wasn't trained for a firefight either.