Manners are important...

Well at least he was polite, as he robbed the credit union.  I'm sure his mother always told him that when he was a young man that whenever he robbed anyone that he should always thank them for doing a good job. I can see his lawyers closing arguments now.  "And in closing, if convicted we feel that my client should receive a reduced sentence because he was polite and thanked the tellers for doing a good job".