[yeah - i sent email to Wolf - with no pithy Darrow quotation, only the dialog from "A Man for all Seasons"]
... anyway, I found no pithy Darrow quotation with his explanation. But I DID find this pithy quotation from Darrow's summation, in which he argued against the death penalty:
"If the state in which I live is not kinder, more humane, and more considerate than the mad act of these two boys, I am sorry I have lived so long."Note: Darrow's 'defense' consisted of...
-1) having both young men plead guilty (thus avoiding a jury trial)
-2) arguing passionately for life-imprisonment - NOT the death penalty.
If you're curious, there's a webpage: Illinois v. Nathan Leopold and Richard Loeb.
Digression: in his novel, Jailbird, Kurt Vonnegut laments that Sacco & Vanzetti are now so forgotten as to be confused with Leopold & Loeb.