Fleeing Felon.
Under US Law the fleeing felon rule was limited in 1985 to non-lethal force in most cases by Tennessee v. Garner, 471 U.S. 1. The justices held that deadly force "may not be used unless necessary to prevent the escape and the officer has probable cause to believe that the...
I can confirm that Fed LE will use military aircraft when needed. Also military contracted ships under military control. In my day we used USMC, USAF, USA ships/pilots all the time. Also used SAT contract ships (Southern Air Transport) OCONUS.