ALLEGAN, Mich. (AP) — Investigators in western Michigan might have discovered the remains of a teenager who’s been missing since 1989.

Authorities say skeletal remains were found in a shallow grave under cement Wednesday in Allegan County’s Monterey Township.

It could take weeks to get an identification.

Undersheriff Mike Larsen says the search for Aundria gained momentum after the November arrest of her adoptive father, Dennis Bowman.

He’s charged with killing the wife of a U.S. Navy pilot in Norfolk, Virginia, in 1980.