Under which condition can police enter without a warrant?

Police can enter without a warrant under exigent circumstances primarily because these situations involve immediate threats that demand urgent action to prevent harm, destruction of evidence, or the escape of a suspect. Exigent circumstances allow law enforcement to act swiftly when waiting for a warrant could compromise their ability to gather evidence or ensure public safety.

For instance, if police are pursuing a suspect who they believe is about to enter a home where they might destroy incriminating evidence or pose a danger to others, they can act without a warrant. This doctrine balances the need to protect individual rights with the need for public safety and effective law enforcement.

Other conditions, such as having a hunch about illegal activities, do not meet the legal standard required for warrantless entry, as mere suspicion is insufficient. Similarly, while an invitation from residents can allow police to enter, it does not apply in all situations, particularly if there is a conflicting right to privacy. Lastly, routine checks do not constitute exigent circumstances that would permit warrantless entry, as they are typically structured and not spontaneous in response to an immediate threat.