Legally, they can be anywhere - even disguised as non-police-type vehicles.
Glimpse
He saw her in the garden of Eden.
Hearing, sight and smell
No
Police cars in sight.
Catch-22 by Joseph Heller
No it is not legal in the sight of law or a religion.
Uh, if someone throws it to them?
No that's why they call it dealing under the table. Or out of sight.
Yes. It is usually referred to as 'plain view.'
Best left to a good gunsmith
because they relil on their smell to catch their food or prey and their incredible sight in the dark