My friend recently got into a break up and the boy she broke up with is calling her a cheater and posting pictures of false texts.I know it's not true because a boy told me it was his friend.Her ex is asking me to tell the name of the boy of ratted them out.They say that they'll take down the pictures and forget this all happened if I tell them his name.But I don't want to cause any fighting.

Should I keep his name a secret or stop the fighting and tell them?

Thanks for being there guys I know I can always count on you!