Two good examples would be; When an officer is "hot pursuit" of a fleeing subject who discards evidence and who needs to seize the fruits of the crime that the defendant had on his person - and/or -when necessary to seize evidence to save it from imminent loss or destruction.
Yes, the officer may search. Police may search a building if they reasonably believe a valid search warrant has been issued. They do not have to possess the search warrant.
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.
if there is belief of illegal activities
a search warrant Also- I believe a Game Warden does not need a warrant.
Yes they can search it
A game warden can search without a warrant i think.
depends if you have the permision of the home owner. If you have the home owner's permision then you can search it. If you don't have the home owner's permision or a warrant then it is illegal. (A search warrant bypasses home owner permision) as it is agreed by court. Hope this helps. - This answer is a UK answer. e.g. the rules may be different in different countries.
To obtain a search warrant an officer must go before a judge and explain the reason for the search. The warrant will list the reason or reasons why they are searching, what they are looking for, and why. please refer to this link for more information, http://en.wikipedia.org/wiki/Search_warrant
The police got a search warrent in order to search the suspect's house. The suspect would not allow the police to search his home without a search warrant.
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.
Only with reasonable cause. Depending on the nature of the complaint, the complaint may or may not be.
They already have a warrant for the arrest of a person so they do not need another one to entire the residence of the named person. However, they do need a search and seizure warrant to search the premises for anything or anyone not included in the "outstanding" warrant.