PIERRE, S.D.(DRGNews)- An autopsy has revealed that a 9-year-old boy killed over the weekend on the Cheyenne River Reservation was the victim of a pack of feral dogs.

In a notice sent out on Sunday, Chairman Ryman LeBeau told Trial members that, “A deceased child was found near a bike with injuries that may have contributed to his death.”

Cheyenne River Sioux Tribe Law Enforcement released the autopsy results Tuesday.

The letter from Chairman LeBeau also says Animal Control and other support programs will be patrolling and picking up animals not tied up, leashed or in a fence, according to Tribal ordinance. If a dog has a collar, the animal will be held for 72 hours at Wakpa Waste Animal Shelter so its owners can claim, register and pay the associated fines, as stated in Tribal law.