Jassi,
First of all, clarification is required. Your brother's in-laws are criminal but they would be in Punjab and not in Mumbai? You also said (in your first post) that his BIL is in Police? So what exactly is their background? Are they criminals or in Police? Which state in coty they are based? Please clarify.
Now coming to your problems, If the poice is harrassing you then you should meet the higher police authorities. If you are staying in Mumbai, then meet the DCP of your area. Hand over him a NC (detailing all the facts) and ask him to direct the respective IO in your PS. Tell him that you are getting threats from his BIL along with the false dowry cases. First make yourself safe and then move forward. I would also advise you to go and meet home minister of Maharashtra, if possible, otherwise send NC to his office and others like CM, PM, State Human Rights and National human rights etc. Don't delay in acting on these lines.
Just send a message to them that you don't afraid of them. Then if they agree, file for mutual consent divorce.
----------------- Jai Hind
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