We are in pretrial continuation, at what point will the court look at documented evidence that child is lying about claim?

A foster female, who has history of sexual inappropriateness and lying, accused my son of sexual assaults. She sexually assaulted my granddaughter within 2 months of placement. She also had other issues of bedwetting, peeing on floors, night mares, etc. She admitted to watching porn at dads on weekend visits and prior to removal from the home. She admitted to asking my son to come into her room and told him she watched a sex movie and wanted him to do the stuff she saw. He said no and tried to leave room, thats when I saw him a few minutes after coming upstairs from bathroom. A specialist physical revealed no penetration vaginally or rectally. She told police there were multiple occasions. Since the granddaughter incident, I watched and documented her actions to foster agency.