1 Book Found

Based on your description:

"What is Murder mystery book: - takes place in England - some main characters Tyler, will, Allie, Claire and more - they are all college friends - one night Leo is murdered and Tyler goes to jail for 29 years but says he didn't do it - when he gets out of jail he calls all the old Friends together For a dinner - that night they are all scared to meet and haven't seen each other since the murder - Tyler accuses one of them going it - will is murdered - turns out Allie killed both guys"