A 17-year-old suspected car thief offered a novel defense when arrested by Madison police — he says he wasn’t stealing the stolen car because he was dealing drugs at the time. The woman’s vehicle was taken Monday night when she left it running while she went into a restaurant to pick up a take-out order.  When police started chasing the stolen car, two teenagers ditched it and ran away.  One of the two was caught by officers.  Police say he’s a suspect in several cases and was wearing a G-P-S ankle bracelet when apprehended.