At 8.30pm on the evening of October 13th, Robert Osborne left his ranch house to look for his dog. When he failed to return by 9.30pm, his wife roused the foreman of the ranch and a search was organised. It was the first of many searches covering a period of many months and an area of hundreds of square miles.Evidence proved beyond all reasonable doubt that Robert Osborne was killed by a band of itinerant Mexican labourers - but the solution to the mystery was not quite so straightforward...