Texas EquuSearch is known for its efforts in the search for Caylee Anthony and participation in the search for Natalee Holloway. The group told local law enforcement they'd be able to commit resources and manpower to help find Sidney.
Hundreds of volunteers helped search wooded areas and brought out food and water as law enforcement search by land, water and air.
The Lawrence County Sheriff's Department says a helicopter as well as local agriculture pilots searched by air. Boats were launched in several locations and dog teams looked for scent trails.
Authorities say mounted patrol focused on a large area near Minturn.
Volunteers are asked to meet again on Sunday at 9 a.m. at the Walnut Ridge Fire Department.
As of now, law enforcement has few leads on where Sidney may be located. Authorities found Randall's stepfather, John Cornell, dead in a ditch on county farmland Monday. Cornell was the suspect in her disappearance.