lost wyoming buck

Hello guys my father lives near cody, Wyoming (maybe powell area not sure yet which ranch he was on that day) where he was hunting a ranch for whitetail. He was out either thursday or friday when he shot a really nice buck. After he shot the buck it ran and jumped a fence and died 150 yards on the otherside, my dad tried to find out who owns the land so that he may get permission to retrieve his trophy. The owner of the ranch he was hunting said he didnt know who owned the land so he told my dad that he sould just go get it rather then let it spoil. My dad was a cop for along time so he didnt like the fact that he was going to tresspass and break the law but he did anyways and when he got to where the deer went down, he found that it died 10yds. from a very well maintained gravel road wich leads him to think that somebody found his trophy and loaded it up, So If you know of such a deer that somebody found please let me know. My dad said it was a big whitetail with 10-12in. tines, (maybe ground shrinkage, lol) he didnt get a point count but he said it was all horn so he dropped it. Please help