The Third Person in the Room

"They were alive when I left them."

Vince robs banks, and he has a rule: never rob a bank too close to home, especially when home is a small town in Central Illinois. He broke that rule last night, and now he's got some big problems.
First problem: three people were in the bank when he robbed it. When he left, they were all alive. Now local news is reporting there were only two people in the bank and they're both dead. He needs to figure out what happened before he takes the fall.
Second probl...