Elijah McClain was injected with ketamine while handcuffed. Some medical experts worry about its use during police calls.

“Why anyone would be giving ketamine in that circumstance is beyond me,” said neuroscientist Carl Hart, chair of Columbia University’s psychology department. “The major problem here is we should never be ordering any medication, and no one should be taking or given it against their will.”

The officers took McClain to the ground using a carotid control hold, a type of chokehold meant to restrict blood to the brain to render a person unconscious. Aurora police banned carotid control holds last month, and chokeholds have been prohibited by police departments across the country in the wake of the death in May of George Floyd, a Black man pinned by his neck while in Minneapolis police custody.

NBC Elijah McClain was injected with ketamine while handcuffed. Some medical experts worry about its use during police calls.