Couple things, and I'm aware of recent events.

Shot != Murder. People have survived being shot before.

People have also been shot while being robbed.

Idk man, doesn't seem like good logic. You label him a robber because he says he's a robber. At the end of the day, he's a criminal so how can you assume he's telling the truth? He's already willing to break the law. So you can't really infer he's not a murderer. At least I can't, maybe you can read minds or something.