The Thane Crime Branch has arrested 70 accused in the Mira Road call centre scam. File pic

The kingpin of the multi-crore call centre scam, who is on the run, was earlier involved in a medical fraud, extorting money from Indians who used to spend high amounts monthly on medicines. Sources from the investigation agencies said the medical racket was being run from Bhavnagar in Gujarat in 2012, but it was stopped as soon as it popped up on the police radar.