Oct. 11 (UPI) -- Defense attorneys for Luigi Mangione, the alleged killer of UnitedHealthcare CEO Brian Thompson, say their client's rights were violated during his arrest and that some federal charges against him should be dismissed. Mangione's lawyers on Saturday morning filed a motion arguing that some evidence against their client cannot be used in court because police failed to obtain a search warrant before examining his belongings. In his federal case, Mangione faces several charges,