Angel Diaz (55), who was still awake after 10 minutes, was observed grimacing, licking his lips, blinking and mouthing words as long as 24 minutes after the first injection (lethal injection = 3 separate chemical injections). At 34 minutes, he was finally dead. Lethal injection usually takes about 15 minutes to work, during which time the inmate is unconscious and motionless.
The injecters stuck the needle past his blood vein and into soft tissue, basically burning his arm with chemicals and killing him slowly. The first two chemicals were supposed to immediately paralyze him and deaden pain; the last is to cause a fatal heart attack. This guy was tortured.