He made a choice not a mistake. He allegedly "CHOSE" to steal. When you do something you choose to do it. You don't mistakenly steal money from a team mate. No one is trying to justify his actions. I was firmly in the camp of we don't need his problems here, but now that he's here I will support him and hope for the best.
If you don't call it a choice, then what do you call it? A crime? Well one of the deffinitions of a crime is a CHOICE by an individual to go against the law of the land and government ending in punishment as decreed by the judicial system.