I believe they do need a warrant to check private property but if the safe is in the car and your entering a restricted area then they wont be needing a warrant.
ADDED: The questioner has neatly left out any explanation as to how and why this safe had anything to do with their vehicle. The police would have been derelict in their duty if they had not looked into the circumstances that they were apparently faced with. If the police had reasonable suspicion that this "un-attached" safe might be the "fruits of a crime" they will take action to either confirm their suspicion or set their suspicion to rest. After all . . . how many people drive around with "un-attached" safes in, or on, their car?
If they have a warrant.
yes police can do what they want including kill you
If the garage is attached to the home, yes they can search the entire premises.
If the basement is attached to the structure it is considered to be part of the structure, and no separate search warrant is needed.
Yes, police can confiscate your keys during a traffic stop if they have a valid reason to do so, such as suspicion of a crime or for safety reasons.
No, but you can turn yourself in and pay the bail. Exception: if the warrant is for failure to appear on a traffic offense, you can generally pay off the fines and the warrant will be recalled.
Using a fake search warrant during a police investigation can lead to serious legal consequences, such as the evidence obtained being deemed inadmissible in court, the investigation being compromised, and potential criminal charges for those involved in falsifying the warrant.
Yes, a police officer can confiscate your keys during a traffic stop if they have a valid reason to do so, such as suspicion of a crime or for safety reasons.
No, a police officer cannot legally put his foot in your door during an investigation without a warrant or your consent.
No, police cannot legally put their foot in your door during a search or arrest without a warrant or your consent.
Yes. The police can search any items if they have a warrant. It does not matter that no one is there to receive the warrant. The police only have to leave a copy of the warrant at the residence.
Yes, police may come to your house if there is a warrant for your arrest.