Anil Deshmukh on Monday. The protest, demanding the resignation of Deshmukh, was held on Sunday and was led by Patil.The case was registered at Vishrambaugh Police station in Pune for unlawful assembly, flouting Covid-19 norms and violating orders under IPC, Disaster Management Act and Mumbai Police Act provisions, an official said.What led to protests?The protests were held after a controversy erupted over the former Mumbai Police Commissioner Param Bir Singh writing to Chief Minister Uddhav Thackeray accusing Deshmukh of running an extortion racket.Singh alleged that Deshmukh had indulged in "malpractices" and asked suspended API Sachin Waze to collect ₹100 crore every month.The allegations made by Singh came a day after Deshmukh had said.