One method to get movement in this case is for the people of Ohio to make it one. Get one media outlet to review it and beat it to death everywhere. Call tv stations. Approach the opposing party to hammer the fact that after nearly 2 years. No arrests. If the candidate can’t resolve a multiple murder how can he run thee state of Ohio.
Not only no arrests but no motive or person(s) of interest ever named. Then there is the fact that all evidence is sealed and the crime scenes under lock and key in storage. How common is that in an investigation?