How far did Isaac Newton go to hunt down forgers?

Newton in 1702, painting by Godfrey Kneller (1646-1723). Public Domain

Today, Isaac Newton is best known for his scientific pursuits -- but he also served as Warden and, later, Master of the Royal Mint. And this wasn't some sort of honorary position, either: Newton took his job of hunting down forgers seriously, and may have even bent (or broken) the law in his quest to arrest and hang his archnemesis, the counterfeiting kingpin William Chaloner.