New Castle County Police are seeking public assistance in identifying a man involved in the sexual assault of a child under 12 at a YMCA in Wilmington, Delaware. The incident occurred in the bathhouse at the YMCA campsite on Chestnut Street and Darley Road. Surveillance footage has captured the suspect entering the building, and a $5,000 reward is being offered for information leading to his identification or arrest. Authorities have also released images of a second man who may have witnessed the assault. The YMCA has notified parents and is cooperating fully with the investigation. Anyone with information is urged to contact New Castle County Police or submit tips anonymously online.