Whenever they have probable cause, or when they have definite evidence.
Government agents can obtain a search warrant when they have probable cause to believe that evidence of a crime or contraband will be found in a specific location. This typically requires them to present an affidavit to a judge or magistrate, detailing the specific facts and circumstances supporting their belief, and the judge will then decide whether to issue the warrant. Search warrants are generally required under the Fourth Amendment to the United States Constitution, but there are exceptions in certain situations.
Obtain a warrant to search for terrorists
In the Bill of Rights the fourth amendment says the government must have a warrant and probable cause to search and/or seizure of your property.
(in the US) Only government agents properly authorized by a judicially issued warrant have the legal authortiy to search a residence. In order to obtain such a warrant they must prepare an affidavit to present to a judge, setting forth the specific probable cause supporting the request. If the judge does not find sufficient probable cause to issue the warrant the affidavit will be denied.
A warrant is a court order that allows police to perform an action, like search a home or obtain a person's phone records. The government should not be able to wiretap phones with a warrant to do so. Otherwise, the government is violating the privacy of innocent citizens.
probable cause
Absolutely!!! It is called helping to secure our borders and country!!! Would you want a vehicle full of explosives intercepted at the border because of a warantless border search or would you rather have it make it through and to its target because the customs agents did not have sufficient probable cause to search the vehicle or enough information to obtain a search warrant?
First, you cannot obtain a search warrant. Police and prosecutors can, but only if they have enough evidence that there has been a crime, and that searching might solve it. Search warrants must be issued by judges.
Warrant
In the Bill of Rights the fourth amendment says the government must have a warrant and probable cause to search and/or seizure of your property.
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.
They must provide a judge with probable cause to do a search.
Only the police can apply for a search warrant, and only a judge can approve of the search warrant. The police only apply for search warrants when they have reasonable suspicion that their suspect is hiding something illegal in his/her house.