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It was done, he demonstrated in minute, Sherlockian fashion, by an injection of the drug succinylcholine chloride, which hitherto had been thought to be undetectable in the human body.

With surgical thoroughness, Schaub showed that Coppolino obtained a lethal amount of succinylcholine chloride � supposedly for animal experiments � from a friend a month before Dr. Carmela Coppolino's death Aug. 28, 1965, at the age of 32.

From experts, Schaub got all the help he needed on the obscure pharmacodynamical properties of succinylcholine chloride.

Suspicion focused on succinylcholine chloride, a muscle relaxant commonly used by anesthesiologists.