As I understand it, in the United States police can only confiscate cameras/film/memory cards if -
(1.) they have a court order
(2.) they arrest you and your camera/film/memory cards are taken into evidence
can't confiscate your property just because they are "the police."
Same in the UK.
"People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.