SHERIDAN, Wyo. (AP) — A Montana Crow tribe member found guilty of poaching an elk in northern Wyoming has asked the Wyoming Supreme Court to review his case.

Clayvin Herrera was found guilty last year of two poaching charges from a hunt in January 2014 that began on the Crow Reservation in Montana but ended roughly a mile inside the Wyoming state line.

Authorities say Herrera shot and killed the elk in the Bighorn National Forest out of season.

Wyoming District Judge John Fenn recently upheld the conviction on appeal.

Herrera, who was sentenced to one year of unsupervised probation and fined $7,500, has maintained as part of his defense that an 1868 treaty allows Crows to hunt on unoccupied land outside the reservation.