Extortion Case?

We recently went to Goa on a University Trip. During the Trip, one of the students slapped the owner of the Hotel we were staying in following an argument over not providing full services and after the Owner abused him. The said owner and his 15 staff members badly beat up this kid and threatened to even kill him. A lot of furniture and the TV etc. were broken while all this happened. Finally the organisers got a hold of the situation and stopped the Owner and his people. Seeing the unsafe environment, the organisers shifted this student to another hotel nearby. The owner called the organisers and asked them to pay Rs. 65,000 as damage on behalf of the student. On failure of doing so, he threatened them with an Attempt to Rape Case and told them he would pay someone to give a statement against them. My question is, is the student who slapped the owner personally liable to pay damage or are the organisers of the trip liable to pay this amount? Secondly, should the organisers file a case of Extortion since he is blackmailing them. We have him saying so recorded as an Audio File. Please help.