How would this be handled by your courts?

http://www.policeone.com/legal/articles/1966734-Are-a-cops-personal-cell-phone-records-fair-game-in-court/

It would be easy enough to examine the cell phone records to confirm or deny the allegation. The judge could do so in camera, avoiding any invasion of privacy or public release of the records.

And that is what the New Mexico trial judge suggested would happen when he made the ruling.