In 1885, the Thiel Detective Agency opened an office in Denver. Allan Pinkerton, who had died two years earlier, left the Pinkerton Detective Agency to his sons. The brothers opened their fourth office in Denver in order to compete with Thiel. They assigned Charles O. Eames to head the Denver office. When it appeared that Eames was running the western branch dishonestly, they assigned McParland to investigate. McParland discovered extensive abuses against clients and against the agency, and reported on them. Everyone was fired except for McParland and Charlie Siringo.