The Babyshambles singer initially escaped a prison sentence after admitting careless and drink driving after a gig in Gloucester over the summer.
But after he was told to pay £2,050 in fines and banned from driving for 18 months, police officers then rearrested him on suspicion of possessing a controlled drug, and swiftly escorted him from the court to the police station across the road.
It is not yet known what controlled substance Pete had on him.