Cortney and Bradly Bartholomew, as well as Kimberly Park will appear at upcoming probable cause hearings in January.
Richard Falor, the fiancé of Rebecca Park, has a pretrial hearing set.
The incident involving Falor occurred when troopers were dispatched to a residence after a reported physical altercation with a 21-year-old male.
Hunter Vanderwall will appear for a bond hearing this week.
The Mason County Sheriff's Office in Michigan is pursuing new leads in the 1993 murder case of 15-year-old Melissa Simmons.
Terry Moore and Mark Canter, two of the "Tobias five" who were convicted and later exonerated for the 1986 death of Jerry Tobias, are now seeking answers to the case 36 years later.
