Imprisoned
He committed crimes on a smaller scale quite frequently. It was the only way he could get his hands on some money fast. When he was breaking into the band room of his school, he decided to steal some valuables.
Calculating A Plan
Everything he was experiencing in the detention center really pushed him to plan an escape. What motivated him more was the sounds of the train outside the center he kept on hearing every night. That was how Walter started constructing a plan on how to get out of that place without being caught.