After being in the army and the military police, Lucas Davenport (a character in the Prey series) brings him to the BCA (the Minnesota Bureau of Criminal Apprehension). The story features a man named Virgil Flowers, who is a three-time divorced man in his late thirties. The series started back in 2007 and finished off in 2013.
He has written 7 books in the series so far Dark of the Moon, Heat Lightning, Rough Country, Bad Blood, Shock Wave, Mad River, and Storm Front.
Virgil Flowers is a book series written by John Sanford, a novelist famous for his expertise in crime stories.