1 – You Consent to Their Entry and/or Search
This is pretty easy to understand; if the police ask to come in and/or search through your things, and you give an affirmative answer (yes, I don’t mind, If you want to, etc.), they are allowed to do so. If police are asking for your permission to come in and/or search you, this usually means that although they suspect that you might be in possession of something illegal, they do not have the ability to enter and/or search otherwise. And the exercise of your 4th amendment rights cannot be used to suggest that you are in fact hiding anything on you or in your house. In any case, it is always best to clearly decline to the officer(s) whatever it is they are asking your permission to do. You have nothing to gain, and everything to lose from consenting to their entry or search.
It is also important to note that if the police are searching you or your residence based on your consent, you also maintain the right to revoke that consent at any time. As long as you clearly and effectively communicate to the officer that you are revoking that consent, they must stop.
2 – There Are Exigent Circumstances Which Require Immediate Action
Exigent Circumstances are defined as circumstances that would cause a reasonable person to believe that entry was necessary to:- prevent physical harm to the officers or other persons,
- the destruction of relevant evidence,
- the escape of the suspect,
- or some other consequence improperly frustrating legitimate law enforcement efforts
