"Mamata Banerjee's tone is changing as this issue is progressing. Her party used to threaten CBI and ED but as soon as cash was seized, Mamata's stance changed. This scam had been going on for a long time. Lot more people will be caught", says BJP's Dilip Ghosh on the arrest of Bengal minister Partha Chatterjee and the recovery of huge amounts of cash from his aide, Arpita Mukherjee, in the teachers recruitment scam.