A suspect is scheduled to appear in tribal court Friday in the death of a 1-year-old girl on Montana's Fort Peck Indian Reservation.

But much remains unknown in the case. Citing the ongoing investigation, authorities have declined to identify the 42-year-old female suspect or say what charges she faces. They also wouldn't say how Kenzley Olson died or whether the woman and baby were related.

Authorities initially said Kenzley was abducted from her home this week in the small town of Poplar. The girl was found dead Wednesday.

FBI spokeswoman Sandra Yi Barker couldn't confirm whether authorities still believe she was kidnapped.

It was the second major event in recent weeks to rattle residents of the sparsely populated reservation near the U.S.-Canada border. Authorities say in February, a 4-year-old was abducted from a Wolf Point park by a man who sexually assaulted and tried to kill her.