WATERTOWN - Authorities have filed a second-degree murder charge against a South Dakota man arrested for abusing a toddler who later died.

Twenty-five-year-old Jay Barse, of Watertown, was arrested Wednesday on an aggravated battery charge after police responded to a report of an unconscious child at his home.

Fourteen-month-old Serenity Seaboy was taken to a Watertown hospital Wednesday and then airlifted to a Sioux Falls hospital, where the toddler died from head trauma.

KWAT radio reports that the new charge was filed Friday. It was not immediately clear if Barse had obtained a lawyer. He's being held on $50,000 bond and is not expected to make a court appearance until next week.

Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.