Regret and the History of Lethal Injection
Along with an anesthesiologist, Dr. Stanley Deutsch, he worked out the drug cocktail method of using three different drugs to cause 1. unconsciousness, then 2. muscle paralysis, then 3. stopping the heart. Oklahoma became the first state to have lethal injection, but Texas beat Oklahoma to the punch of killing somebody that way. (In 1982)
Wiseman has agonized over his place in history ever since.
Here is a video of an interview he did a few days ago.
Here's an article Wiseman did for the Dallas Morning News last month.