While the others of the gang were ones of weapons and force. Bronemark was a man of science albeit one that was seen and recognized by his peers as twisted and unethical. To Bronemark it was simple: How could man not want to understand the secrets of his being at the cost of a few of the flock?
Bronemark was by far ahead of his time and with the evolution of ghostrock developed a number of inventions and tools to keep the Stones River Gang in control of the wide expanse of the West. The benefit for him was the riches, the test subjects, and the cloak of darkness that the gang provided.