Help Needed

A person x commits suicide and leaves a note.I don't know what exactly is written in it but I got information from Mr y that there can be 2 things mentioned in note. 1. His wife had an affair with me. 2. Another colleague Mr Y who was having an affair with his wife threatened me in 2014. I was a good friend of lady but when I came to know her affair with Mr.y I told her not to do so and when she didnt understood i ended our friendship.I don't have any contact with her since 2014 and now suddenly all this happened. I don't know what to do? As I don't know what exactly is there in note. Another colleague Mr y was having an affair with his wife since 2014 & Mr x came to know that. He had some fights with his wife and that guy Mr y and compromised but later he committed suicide. Now his family members have filed a complaint in police station. What to do as Mr.y told me that police is calling him to give his statement but he is not answering & can also call me regarding this. Please guide what to do.