The Mumbai Narcotics Control Bureau (NCB), which arrested Ajay Raju Singh, 50, alias Mamu on Saturday, has learnt that he peddled drugs using code words such as bullet/capsule and was also known to his customers for supplying ‘pure’ drugs. There were also three categories in this, called blue, green or black bullets/capsules.

According to the NCB, Singh sold drugs to high-profile people and his customers were also fixed. If they wanted pure drugs then they had to choose the blue bullet/capsule, for medium grade drugs it was the green bullet/capsule and for low grade drugs it was the black bullet/capsule.