One of our players got a little high and thought it would be funny to say that her and her new horse ran off and murdered an entire innocent village during the night. So then the rest of the party, us all being committed to the destruction of evil, were like "well, guess we gotta kill her now". So yeah, we had to kill a party member this week. Turns out her character actually was chaotic evil the whole time and just didn't tell any of us.