Seven people have been indicted on federal charges of conspiring to distribute cocaine and marijuana on Pine Ridge Indian Reservation.

Lawrence Vigil, 25, Alvina White Bull, 47, Lyle Wilson, 47, Darrell Saucedo, 21, Tyler Eagle Bull, 23, Dominique "Dom" Saucedo, 25, and Joe Brewer, 21, have all pleaded not guilty to the charges in U.S. District Court.

Vigil and the Saucedos are from Oglala. White Bull, Eagle Bull and Brewer are from Pine Ridge, and Wilson is from White Clay, Neb.

They're charged in connection with an alleged conspiracy that prosecutors say dates back to at least 2002. According to a news release from the U.S. Attorney's Office, the defendants face mandatory minimum penalties of 10 to 20 years in prison with maximums of life in prison and $4 million to $8 million in fines if they are convicted.

Trial is set for Aug. 5.