Ya know... I can understand forgetting to take the safety off when things are as heavy on his mind as they appear to have been.... but to forget to load the weapon?!? Dude was obviously not thinking straight.
As for the good morning greeter not leaving after being told "You need to get out of here", and then for him to attempt to shoot her in the back is just odd to me. Was she frozen in fear? Do we even know if the bank was open yet? I did a quick search but didn't find an answer. Once upon a time, long, long, ago, in a land far away I worked in several different bank branches. The key in the branches I worked at were left in the door so all the officer had to do as people arrived for work was to walk over, turn the key, and let people in, then relock the door. Rather, rinse, repeat as people arrived at various times.
The only thing that makes sense to me for that woman not to have hightailed it out of there, and still ended up shot in the back, might have been because the bank wasn't open yet AND their officers don't leave the key in the door. That's all I can come up with because frozen with fear just doesn't seem very possible to me. It's all so horrible.
Does anyone know if the bank was open or closed for business when events unfolded?