A search warrant must particularly describe the items to be seized. During the course of serving the warrant, while searching for the particular items to be seized, if the officer finds items that he has probable cause to believe are contraband or evidence of a crime, he can seize those items as well.
The scope of the search is a relevant factor. If the search warrant is to locate stolen cars, and the officer finds drugs while looking inside a desk drawer (where you cannot reasonably expect to find a stolen car), that evidence would likely be excluded. However, if while looking for a stolen car, the officer enters a garage (which is covered by the warrant) and inside he finds a pile of stolen license plates on the floor of the garage, those would be seized and would not be excluded.
Yes you need
If the warrant is valid it is.
NO. He can search your car if he has just cause without a warrant.
Items in plain view can be seized without obtaining a search warrant.
A warrant.
Yes. Anythig that has been 'discarded' is considered to be trash and can be lawfully seized, searched, or impounded without a warrant. .
Absolutely not. They can only confiscate the types of items outlined in the search warrant, as long as nothing else criminally possessed was found while searching the house.
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No, not unless the error was found and corrected by the issuing judge or magistrate BEFORE the warrant was executed. If the warrant was served at the wrong address, anything found and seized could be excluded as evidence.
Unless it has served its purpose, it will survive, or when the person or the thing to be seized has died or has been lost.
You don't get a copy of the search warrant unless you are the owner or legal inhabitant of the premises on which the warrant was served. Then (according to the laws of your jurisdiction), at the conclusion of the search you may get a copy of the warrant along with the list of seized items.
The the place or person being searched. What item(s) is to be seized. A copy of the affidavit use to obtain the search warrant. The name of the person swearing to the affidavit. The time at which the search warrant may be executed.