OK, well it's clear that press conference went on so long because of DeWine's involvement with getting the use of familial DNA approved in Cleveland, and his run for Governor. Lots of pats on the back going on.
So this



has a family member whose DNA was somewhere in the system, and that's what ultimately led to him, even though a conflicting statement was made about DNA not being the end factor that led to his arrest (unless I completely misunderstood that).
They are still investigating other crimes with a similar M.O., but no DNA evidence so they are still working on those cases.
He had a previous record - minor, drug related. Not sex related.