Can the police ever search without a warrant?

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There are numerous circumstances under which a search may lawfully be made without a warrant. The search can be conducted without a warrant if the safety of the police officer is involved. It may also depend on whether the police are in hot pursuit of a criminal or when they see illegal evidence in plain view. If a person consents to being searched, and/or if a lawful arrest has been made the police can search without a warrant.