Releasing passport held for a work injury case at the court

Hi Sir,

I am K.

I am working as a safety officer in a construction site. 1 year before, there was an accident to a worker, which caused fracture on the leg.

He was given all the treatment necessary and waiting for the final operation next year Feb  (2020). For the last 1 year, the police are holding passports of our project manager, me, and the foreman.

This month, I have one exam in India and I have to get back to India for that. I had also given resignation to my employer.

How can I get my passport?

Please advise me.