Who did Thomas Schumacher murder in October, 1988 in Amairllo, Texas?

Question

The murder happened on October 9, 1988. Shumacher was found guilty and sentenced on August 15, 1989. The muder was done with a gun and involved drugs

Answer 1

Couldn't find anything using the usual resources. There are other ways to search the web, but I am a newbie at this so don't use me as a reference...