The Mason County Sheriff's Office is releasing more details about the bones discovered last week near Ludington.
Twelve bone fragments were found Friday near Morton and Chauvez roads about five miles south of Ludington.
The bones were taken to a forensic anthropologist with Michigan State University for a closer look Wednesday. The anthropologist said one of the twelve bones is human. It was determined the bone was a skull fragment from an adult.
"What we do know now is it is an adult fragmented skull, part of a skull," said Mason County Sheriff, Kim Cole. "So we know it's not Baby Kate."
The bone was left with the forensic anthropologist for further testing and examination.
"We have to take our time with this investigation," said Cole. "Right now we're just waiting on the forensic anthropologist to let us know where to go next."
Sheriff Cole says that it could take days before they get any more answers from Michigan State University.