MINNEAPOLIS (AP) — The NFL has formally begun a review of Minnesota Vikings running back Adrian Peterson’s case, for potential punishment under the league’s personal conduct policy.

Spokesman Brian McCarthy said Peterson was told by the NFL on Thursday that his status on paid leave from the Vikings will not change until completion of the process.

That means Peterson’s return could take a while. He pleaded no contest in Texas on Tuesday to misdemeanor reckless assault, down from a felony charge of child abuse for disciplining his 4-year-old son with a wooden switch.

The league said it requested that Peterson submit relevant information from his case and meet with designated experts who will make recommendations for Commissioner Roger Goodell’s consideration. He’ll have the opportunity for a hearing before any punishment is levied.