Comment by themafia

The condition here being she was already arrested. You don't arrest someone first and then try to establish their alibi second. That would be an investigation which would be prior to getting a warrant which would allow you to arrest someone. You will never talk yourself out of an arrest, you might talk yourself out of an investigation.

You can offer your story to the police but the fact that you did or what you said to them will not come into evidence in court. You cannot call the officer to the stand and then ask them to repeat in court what you said. That would be "hearsay." So, for a lot of reasons, if you're already arrested, you probably don't even want to tell them any of that. It can only be used against you and never for you. Get your lawyer and have them ready the case to prove that alibi for you.