Sir,
You may also want to research the general authority under which most of us operate under.
United States Supreme Court Decision: Taylor vs Taintor, 16 Wall, 366. I believe the year was 1873, others will correct that date if ti is incorrect.
You may also wish to contact Scott Harrell of Compass Point Investigations,
www.bondforfeitures.com. He has assimilated a mass of information on the history of this industry.
Some of the most famous "Bounty Hunters" that you may find of interest are Ralph "Papa" Thorsen and Bob Burton. Mr. Thorsen is deceased, but Mr. Burton is not. Mr. Burton has written 2 books that I know of regarding Bounty Hunting.
Good luck in your writing endeavor. Please feel free to contact me directly if I may be of further assistance.