They just brought back that form of execution, and it's an improvement over lethal injection as it is practiced, or the electrical chair or gas chamber.

Lethal injection could be humane, they choose not to make it so. Nothing would be more humane that a hot shot of opioids and benzodiazapemes and the like. They want them to suffer and use their other formulation that does cause pain even as it makes the person unable to show that pain, as I understand it.

The electrical chair is grotesque, as was the gas chamber as practiced that not only is disturbingly similar to nazi shit, but also operated as with the lethal injections.

So firing squad is much more humane, hanging is humane, guillotine, etc would all be better. Obviously though we can't trust the system to convict the right people so we shouldn't have the death penalty. But certain exceptions could exist, for people that would use corrupt influence to get their conviction overturned, cancelled, and do more harm, politically connected people, the super rich.

And yes, shady companies like these, are the perfect recipients of said penalty with due process as they would pay off higher ups to get it cancelled and abuse more people.