i know of a posek who spoke about this painful topic. he said that Al Pi Torah we should kill a molester (like a moser, the story of R’ Elchonon Wasserman who killed a moser in the mikvah) because he causes people to die (commit suicide) nowadays, we don’t suggest that (the killer would be in trouble) but at least imprisonment for life. Halevai more people got up and spoke out against these molestors. This same posek said he got a shayla from someone who asked if he can help a molester who just got out of jail find a parnasa.
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