It would be good to pray for all parties involved and that God's will be done, if not on Earth than in Heaven.
False accusation is a terrible thing. It hurts people through undeserved punishments, taints the one carrying out the punishment, and brings dishonour to the friends and family of the accused. It also harms the accuser. Christ was falsely accused. I reckon God will deal with false accusers harshly, seeing as this was a sin He considers grave enough to have made it's way into the Ten Commandments.