What does “beyond a reasonable doubt” really mean?

In this You Be the Jury episode of Murders, Mysteries, and Conspiracies, host Glenn P. Clinger III puts you inside the jury box for the controversial Michael Peterson Staircase case.

A woman dead at the bottom of a staircase.
A husband claiming it was an accident.
No murder weapon.
Conflicting expert testimony.
A second staircase death years earlier.

With no clear answers and no hindsight, you’ll weigh the same evidence the jury faced and decide for yourself: Was the verdict just—or did doubt go ignored?