- You may be looking for John Justice Wheeler.
This article contains spoilers from the 2017 series of Twin Peaks. If you are not up-to-date with the aforementioned television program, it is strongly recommended that you do not read this article.
Jack was Cooper's mechanic.
He later closed up a garage containing Cooper's car and gave him a new one. Cooper began to rub Jack's face and soon killed him after discovering that he wired the car.