does the state of ohio allow lawsuits of criminal conversation in the work place?

thank you

I have no idea what you mean.

If you heard a conversation in which criminal activity was discussed, call the police.

I think your real question is whether or not you can get rich via lawsuit by holding this over the head of the person you overheard... and the answer is no. That is called extortion and is as illegal if not more so than the crime you overheard.

Call the police.