Documents obtained by Tony Webster show Special Agent Bill O'Donnell issued a warrant to Facebook for "all information retained" by the company on Diamond Reynolds, Castile's girlfriend. This was to include all email sent or received by that account, as well as "chat logs," which presumably means the content of private messages. The warrant also demands any communications that may have been deleted by Reynolds, as well as metadata on photos or videos uploaded to Facebook. It came accompanied with an indefinite gag order.
'Indefinite'. Isn't that interesting?
Way to go, guys.