Yes, definitely, because even though you have a situation in which no harassment is found, you're facing a damaged workplace. If the employment relationship should continue, I think from an HR perspective, there should be some intervention to make sure that the workplace is repaired and to make sure that we're not creating another problem.
In our environment, it's probably easier. I've tried it in your environment a few times. It's a bit more tricky, but it does work. As I said, mediation can work miracles, and I've seen it work miracles, so that's an avenue that we try every time we can.