One caveat: at least in some locales, a license is required to own (or perhaps carry) a police scanner.
https://www.zipscanners.com/resources/are-police-scanners-le...
Kinda like using a gun in the commission of a felony...is a felony.
Or being arrested and the only charge is resisting arrest.
See Indiana’s law: https://codes.findlaw.com/in/title-35-criminal-law-and-proce...