Other than killing the motherfornicator, what good what a confrontation do? If other witnesses to the crime aren't willing to stand up, then slander charges could be leveled.
In this scenario, I'm afraid outcast's suggestion, tongue-in-cheek as it may be, just might be the only answer. If indeed, justice through the courts is not attainable, there may be only one option.
A victim willing to go through with offing the perpetrator should use good judgement.(LOL) What I mean is, Is it highly likely that the perp will offend again? Do you have dependents at home that will suffer because of the strain of a trial and loss of support due to you being in prison if convicted of murder?
Maybe hire a private eye to see what the perv is up to these days?
TR