My friend and his girlfriend were in a parked car and cops came

My friend took his girlfriend who is 19 years 5 months old in his car. He parked the car in an isolated place sitting next to her. Suddenly a police jeep came with two cops. They threatened them to come to police station. Since she is still studying he didnt want anybody to know about this. So when the cops indirectly asked for bribe. he payed them Rs 6,500. They had a white slip in which they wrote his name, address and made him sign on it. One cop also took pictures and videos of the girl sitting in the car. Since my friend requested, they deleted the video and the pictures. He requested for the white slip also to be cancelled, so they tore the slip in front of him itself. My friend is worried if anybody will come to know of the incident as it will create a lot of problems for the girl. He has paid them money and he wants the issue gone. Will the cops trouble him legally? and what is that white form? is it a summons? they tore it in front of him only. She is a major and he doesn't want any court notice at his place. Are the cops satisfied with the money or will they trouble him legally or in any other way? He was not doing anything vulgar with his girlfriend. Please advise