Patience.
The “witch hunt” type cases tend to fall apart within a few years – so if he was framed, it will come out. Evidence that was surpressed can always be released and publicized once the case is done in the courts. New witnesses, for either side, can always come foreward. Since the case was closely tied to anti-Satmar biases, which are likely to get worse (especially if Israel starts conscripting anti-zionist hareidim, which Satmar will protest vocally, causing more anti-Satmar hatred by many of the same people who brought this case), the issue won’t disappear.