I don't know about the whole assassination on Tybalt, but from Barroes' point of view, Tybalt and his soldiers were going around and acting like thugs. Additionally, when asked to explain, Tybalt really didn't say much about the whole situation. Barroes, being told that the "assassin" was actually the good guy, was led to believe that Marr was the perpetrator in the situation.And wielding a Tideborne crossbow after Barroes witnessed that whole Heaven's Reach raid, well, it wasn't a fantastic idea. Anyhow, Barroes thought it'd be a good idea to begin dealing with Marr, given the circumstances. Never OOCly said that you were the perpetrator, it's just that Barroes RPly thinks that. Hope that helps the situation.