FLINT, Mich. -

Authorities have charged a 74-year-old Flint woman with murdering her teenage granddaughter 15 years ago.

Genesee County Prosecutor David Leyton announced Wednesday that his office has charged Lois Janish with an open count of murder in the death of 14-year-old Coral Hall. The girl disappeared in 1998 and her body has never been found.

Leyton spokesman John Potbury says the teen went missing after calling a friend asking for a place to stay and saying she'd been fighting with her grandmother.

Coral was living with Janish and Janish's boyfriend, now dead.

Leyton isn't saying what broke the case but tells WNEM-TV that Janish was always a suspect in her granddaughter's disappearance.

It's unknown if Janish has a lawyer. The Genesee County Jail's information line was repeatedly busy Wednesday night.