Police tenant not showing id

Hey guys , I have this flat in Bailey road ,Patna which my father gave to some guy to live in with his family.At first he said he was in some army unit later on clarified that he has joined Police services ( his father was already a retired cop) . We asked for his detials which he obliged giving his pan , aadhar but never provided us with his official Police ID. Due to the infrequent rent payments and delays my father already suspects him as a scamster . We have tried approaching our local SHO but he declined to help us telling us to report the "tenant" to his superior. We don't know which department he is in . All we know that he goes for training in the Sardar Atal Bhawan ( currently undergoing cyber crimes training as such as stated by him ) . We have also talked to lawyers about sending him legal notices to make him evict but we know going by the law could result us in losing the said property. Can anyone give me an idea on what am I supposed to do ?