I don't see corruption here but rather the police officers were trying to threaten the bitcoin trader who must have convinced them to invest in bitcoins. I don't know what benefit he got by doing that. He could have just filed a complaint against them rather than commit suicide and leave his family at risk.
Just look at the bigger picture and you will understand whether it is a corrupted official or not, anyone could invest in bitcoin without anyone's help, all they need is to register an account, comply with a KYC and send money through banks and that is the simplest thing you can do to invest in bitcoin, but they approached a third party to invest, we all know that there is no licensed bitcoin broker like we see in stock investment, since they invested a huge amount, if you read the lines in between we could come to a conclusion they could have invested when the price of bitcoin was really high. Since the people who should upload the law was after him, he could have felt like a trap that he cannot escape.