I would suggest you start with schooling him on how the FBI, CIA and other "law enforcement" types are notorious for framing people and to imagine that it's possible his client has been framed. if through his interactions with the defendant the defendant plausibly admits guilt (not a false confession...which exist more than most realize) or the facts are unavoidable even with a truly unbiased interpretation, than I think he should be honest with his client and say the evidence is overwhelming and does not bode well for going to trial. he should offer that this behavior is unhealthy and should be first acknowledged and then focused upon to change.

while many suggest they'd just kill em all, wec need to be more realistic and forgiving in many instances. also, forcing pedophiles into the Sshadows by handing down capital punishment would only serve to promote more and more deceit from pedos.

perhaps he could use this scenario to provide a human approach with this pedo that otherwise stands no chance to God and/or the error of his ways in manipulating those incapable of knowing any better. perhaps offer some legit counseling that would seek to get to the root cause of these behaviors (e.g., having been abused as a child themselves, having domination issues, and/or just being psychopathic)

lastly, if he doesnt intervene now it wouldn't surprise me if the pedo got rewarded for his tendencies via immunity via the FBI or some other deepstate actor that scoops up these godless creatures to act as a patsy or some bigger part of their evil machine