I used to hunt deserters from the USN. Lots of fun. Federal "want", meaning no judge had to issue a warrant, the Navy could do it. And sure as the day will dawn we'd get a guy who thought he could get out of going to a Marine operated brig*.
"Hey, you guys didn't read me my rights!"
"Oh, sorry. Here we go: Anything you say will be taken down, twisted around, altered and used against you in farce of law. Do you have anything to say before you're given a fair trial, found guilty and confined for all eternity?"