At one stage, police resorted to using a dentist to examine the children's teeth to establish their ages and find out if they were above the age of criminal responsibility. One 14-year-old, who claimed to be under 10, was arrested more than 90 times. Another , now seven, was arrested 27 times and her eight-year-old sister 46 times. The children would be returned to their home address, from where they would set out the next day to rob passengers in the West End.