There’s more to this than meets the eye. Especially since the retired police captain had never shot someone during his career. If you’re interested check out the book that in a chapter explains how Target figured out how a girl was pregnant before her parents did.
It explains where habits reside in the brain and why they are not under conscious control. It may also explain why Reeves shot the guy after being attacked. Even Reeves was shocked by what he had done.
"My habits made me do it"? Sorry, nuh-uh.