DH randomly brought this up last night and we can’t remember the name of it!
It was set in an island community just off the US. A couple were getting married and all their friends came. There had been a mass murder/serial killer on the island years previously and the female leads mother was murdered. I think I remember bodies hanging from trees. The groom to be was one of her best friends. There might have been a wealth divide - grooms family rich hers poor or vice versa. I THINK her father was suspected of being the murderer. The friends visiting for the wedding started being killed off.
Anyone?? I’m remembering more and more but still can’t remember a name.