After someone sent an anonymous letter to the Texas Medical Board complaining about alleged unprofessional behavior by Dr. Rolando Arafiles, Arafiles had his friend, Winkler County Sheriff Robert Roberts Jr. investigate where the letter came from. After getting a search warrant for computers at Winkler County Memorial Hospital, where Arafiles worked, Roberts determined two nurses at the hospital sent the letter. The hospital fired the nurses, and Roberts charged them with felony misuse of official information. The district attorney dropped the charge against one of the nurses but prosecuted nurse Anne Mitchell. It took a jury less than an hour to find her not guilty. The nurses are now suing the county.