Police arrived at actor/F-18 jet Charlie Sheen's house on Tuesday night and removed his twin boys from his custody, following allegations that he threatened his ex-wife Brooke Mueller on several occasions. (Mueller had obtained a restraining order against Sheen earlier in the day; she alleges that he threatened to "stab [her] eye with a pen knife" and, at another time, "cut [her] head off, put it in a box, and send it to [her] mom.")