I'm not sure Memphis tn is a crime.
yes
Yes, there are.
yes
There is no such thing as a registered gun within the state of TN. Class III items are registered, but that is a federal thing. You can, however, pawn any gun in TN that you legally own.
Greater London. Even there, gun crime is rare and knife crime tends to be the police's biggest concern.
Depends on the crime. A felony, or crime of domestic violence, no.
No
No, but a FOUND gun should be turned over to authorities, Possible that the gun was stolen, or discarded after being used in a crime. Could be very difficult for you to explain why YOU have a gun used in a crime.
"Gun crime", "gun felony", etc. refer to any crime in which a firearm was involved. It's a term often used by anti-gun politicians, organisations, and publications as a fear mongering tactic.
Yes
Yes. You can be charged with a crime for refusing to return secured collateral.