You're not correctly interpreting what "cdwjava" has been telling you, and he hasn't once suggested what you are or aren't interested in.

What "cdwjava" is doing is making a distinction.

First of all, you need to start with two sets of things: (1) cases in which DV has occurred (Set A); and (2) cases in which no DV has occurred but in which DV is alleged (Set B). Some percentage of Set A cases are never reported. We'll call those that are reported Set C. 100% of Set B cases are reported. We'll use Set D to refer to the sum of Set B and Set C.

Out of the Set D cases, some percent are never investigated and some are investigated. We'll use Set E to refer to those Set D cases that are investigated.

Out of the Set E cases, some result in an arrest and some don't. We'll use Set F to refer to those that result in an arrest.

Out of the Set F cases, some result in charges being filed and some don't. We'll use Set G to refer to cases in which charges are actually filed (we'll include in Set G cases in which no arrest is made but charges are filed anyway).

Out of the Set G cases, some go to trial and some don't. We'll use Set H to refer to cases that go to trial. We'll use Set J to refer to cases that are filed and then dismissed and Set K to refer to cases that are filed and result in plea bargains.

It sounds to me like you want Set G to be your denominator. Correct?

"cdwjava's" point seems to be that the percentage of Set H cases in which a conviction results is very high because prosecutors don't go to trial on cases that have a significant likelihood of not getting a conviction. While that's true, it's somewhat beside the point.

I believe it is also true that prosecutors don't file charges where there isn't a pretty good chance of getting a conviction. However, it should be obvious that the percentage of cases that result in convictions as a percentage of Set H cases will be higher than the percentage of cases that result in convictions as a percentage of Set G cases.

In any event, the sources of data for Random County, Ohio are going to be quite limited: the prosecutor's office or the public defender's office. Beyond that, you'll have to spend significant time at the court clerk's office combing through public records.