BStrong
Penultimate Amazing
The JFK assassination meets the very definition of EC. Oswald was dead and they couldn't try his corpse in a court of law to "prove" he was the lone assassin. For FBI uniform reporting purposes, the case was cleared without using a court of law to determine the facts of the case. You may want to reread where you posted the WC's findings about Oswald's guilt earlier.
Seriously, read something.
The LEA I served in used EC twice in 15 years - one was a case that involved a suspect out on bail that was killed in a DUI vehicle crash, and the other was a suspect that died of natural causes in custody while pending trial.