The two were visiting the investigator from out of town. According to statements, Simpson got into an argument with the investigator's brother after she wanted to leave in her vehicle and he denied her access because she was intoxicated.
Simpson searched a container in the residence and located a set of keys to the Sheriff's vehicle and left the residence behind the wheel. Simpson's boyfriend attempted to stop her as she drove away; reminding her she was taking a sheriff's office vehicle to which she responded "she didn't care". The investigator was not home at the time of the theft.
Approximately 20 minutes later, Simpson returned to the residence, dropped off the agency vehicle and got into her vehicle. Simpson was stopped a short distance from the home by a deputy who subsequently arrested Simpson for Driving under the Influence (DUI) and Grand Theft Auto.