21E Street 
P.O. Box 590
Eagle Butte, SD 57625

Office Phone: (605) 964-6686
Office Fax: (605) 964-2570

Tracey Zephier, CRST Attorney General
CRSTAG@protonmail.com

Roberta Tiger, Office Manager
roberta.crstprosecutor@gmail.com

Julie Yardley, File Clerk 
julie.crstprosecutor@gamil.com



To Provide Legal Services to Cheyenne River Sioux Tribe's Tribal Programs on the Cheyenne River Sioux Tribe reservation. To exercise and protect the powers of self-government secured by the Treaties. To Serve and protect the Cheyenne River Sioux Tribe's reservation resources (land, minerals, culture, etc.) To Protect the Cheyenne river Sioux Treaties Rights both on and off the reservation.