What does it take to spend 35 years on the frontlines of Delhi Police? In the first episode of HT's new special series, 'Case Files' with Kumkum Chadha, former Special Commissioner of Delhi Police Dependra Pathak opens up about some of the most challenging, controversial and headline-making investigations of his career. From busting the infamous CPMT exam paper leak and interrogating alleged exam mafia mastermind Ranjit Don, to handling the women wrestlers' protest, protecting the Prime Minister, investigating a horrifying nose-chopping case in Delhi's red-light district, and even dealing with an unusual complaint involving a Bollywood actress's puppies, Pathak takes viewers behind the scenes of policing in India's capital. Watch the full episode and tell us in the comments: Which case shocked you the most?