Gibbs shooting after running

He stopped and swung up the rifle. The ex-redneck was just under thirty feet away. Not a great lead, but enough of one. The zombie’s single white eye made a great target in the low light. Gibbs lined up, breathed out, and squeezed the trigger.
The eye vanished. The redneck dropped. The animal trap pinged against a rock as it hit the ground.

Excerpt From Ex-Isle, pg 607
Peter Clines
https://books.apple.com/us/book/ex-isle/id989619017