In which scenario can law enforcement enter a residence without a warrant?

Law enforcement can enter a residence without a warrant primarily under exigent circumstances, which is often the case when a wanted person is present inside. This situation allows officers to act quickly to prevent the potential destruction of evidence, the escape of a suspect, or harm to individuals inside. The pressing need for action in the presence of a wanted suspect justifies the lack of a warrant in these scenarios.

While other options mention circumstances that might lead to an entry, they either require more substantial evidence or may not always meet the immediate need for action. In the case of entry based solely on noise disturbances, though it could lead to further investigation, it doesn't inherently justify entry without a warrant unless there is a clear indication of immediate danger or other exigent circumstances. Similarly, a belief that a crime is in progress does have the potential to justify warrantless entry, but it requires a more specific and timely basis for immediate action compared to the direct presence of a wanted person.