Sergeant Preston of the Yukon – Eye Of Evil (1955)

https://www.youtube.com/watch?v=zZHgjj9_4XA&ab_channel=ClassicsCast

Treachery abounds as a wealthy man’s business manager murders a jewel thief in order to obtain the “Eye of Evil”, a $100,000 black pearl that was stolen in the U. S. and smuggled into the Yukon in the hope of finding a buyer.