Jeff Case is a character created by Mike Slavin. He is the protagonist of a crime thriller series that begins with Kill Crime in 2019 and continues through Primed to Kill and Wrong Kill.
Across three novels, Case finds himself caught up in violent criminal situations that test his limits. The series also includes the short story Life-Changing Money, which adds to his backstory.
You can find the complete list of books featuring this character on the Jeff Case series page.