A warrantless search of a locked container could be the subject matter of a motion to suppress. I have won this issue in courtrooms (and appeals) before -- but every case requires an individual analysis. Speaking in private with an attorney in his/her office would be a good idea.
I need more information. Was the locked safe in the trunk or the cockpit? Was the car drivable or was it impounded? In general the police need a warrant to search. There are some exceptions. We all want to know what was in the locked safe and were you charged as a result of the content found?
Under some circumstances, yes.
In other circumstances, no.
More details are needed to determine which category your situation falls in.
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