A warrant may be necessary for the police to search the server that Facebook is running on. It is also possible that FB may choose to allow the search without a warrant.
If the 'search' is simply examining publicly available information on any web page, no. A warrant would not be necessary.
Yes all police officers need a search warrany in the UK
Yes, the police do need a warrant to search your locked roof mounted cargo box.
Yes, police generally need to show a search warrant before conducting a search, unless there are specific circumstances that allow for a search without a warrant, such as consent or exigent circumstances.
Probable cause.
They must provide a judge with probable cause to do a search.
Yes. The occupant/resident need not be present at the time the warrant is executed.
no they do not have to show you all they need is the search warrant. But what you should have done is to see the warrant. Sorry
yes they have to have a paper signed by a judge
Yea
they need a warrant
Yes. Depends upon the circumstances, for example, if the individual entered the residence to avoid apprehension and the police witnessed the act then they do not need a search warrant.
To come into a home the police need a search warrant to search. Without the warrant the evidence is not admissible in court. It would be an illegal search.