sandy german who has been covering this story since it happened. this revelation about the unlocked door, do police think that would have prevented the shooting from happening? reporter: well, the sheriff said at the news conference today that basically, it s unfortunate that the door was unlocked, but this gunman, karl pearson, was intent on evil is how he put it, and he would have found a way into the school no matter what, because he came armed with not just the shotgun but also a machete and some molotov cocktails and a lot of ammunition, like more than 125 rounds. so it just seemed from that alone that he was bent on getting inside and he would have found a way regardless. the sheriff also praised the school for the way officials handled what happened there. it s unfortunate that lessons have to be learned this way. but what was done right, according to authorities out there? reporter: so basically, the janitor saw the gunman and he immediately initiated the school lockdown