In March, a day after receiving an injection, Ms. Pichardo, 43, died of what the medical examiner later determined was a silicone embolism in her lungs.
Cook County's chief medical examiner Doctor Stephen Cina says an autopsy may help determine whether the cyanide was swallowed, inhaled or injected and provide other details.
The Cook County medical examiner says an autopsy on Urooj Khan is expected over the next few weeks.
It is the law in nearly all US states that bodies are not to be touched until the medical examiner (or a deputy medical examiner) arrives.
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