in or supervise the prevention, detection, or investigation of any violation of criminal law. (9) Unit of local government The term unit of local government has the meaning given the term in section 901 of title I of the Omnibus Crime Control and Safe Streets Act of 1968 ( 34 U.S.C. 10251 ). (10) Deadly force The term deadly force means that force which a reasonable person would consider likely to cause death or serious bodily harm, including— (A) the discharge of a firearm