Jammer Davis is an accident investigator for the NTSB.
He is considered by most as one of the very best they have and that is a good thing because he is also one of their most insubordinate ones. He does not play politics worth a bean and cannot understand the idea of doing something simply because his boss said so. Most importantly for his reputation is his unwillingness to just let something go. If he is asked to find out why a plane crashed, he will regardless of whose toes get stepped on.
Davis is a former Major in the U.S. Air Force, a man who was a Marine grunt before changing professions. This history gives him a unique perspective on a lot of things from common pair of boots on the ground feels to how a man in charge of a million dollars worth of aircraft would operate. It also makes him unafraid to get his hand dirty and totally willing to take a gamble when the stakes are worth it.
The reason for Davis' entry here, though, is the fact that one the assignments he has been given which have been recorded in the books thus far, his investigations have lead him into contact with some very unpleasant people who have desires to cause a great deal of harm to the U.S. His actions in the first such case brought him to the attention of the powers-that-be and when a situation came up in the second that could use a man like him, he was the first one thought of.
Davis can shoot pretty well and fight even better and he has a great eye for detail and can spot things amiss too well for his own safety. He likes a good scrap, too, even if that takes him away from his daughter, a high school student who, as a single parent with the death of his wife from a car accident, is the most important thing in Davis' life.