[Repealthe17thAmendment]

If the murder occurred on Federal land, in this case, a National Park, would the state of Wyoming prosecute the case, or would it be the US Attorney in Wyoming?

[KevinB]

If the murder occurred on Federal land, in this case, a National Park, would the state of Wyoming prosecute the case, or would it be the US Attorney in Wyoming?

Great question. The US attorney in Wyoming would have jurisdiction if it's found the crime occurred on US-owned land.