A dance instructor trusted with caring for kids is suspected of sexual assaulting children. Twenty-eight-year-old Tyree Dumas of West Philadelphia, the founder and CEO of the Dollarboyz headquartered in 54th and Market streets, faces three separate counts of sexual assaults on children and related charges including endangering the welfare of children. Police say the sexual assault incidents occurred in January of 2008, February of 2013 and June of 2017.