Explain how the idea of 'reasonable doubt' particularly pertains to this case.

In the American criminal system, those charged with crimes need to be proven guilty 'beyond a reasonable doubt.' It is up to a jury to decide what that means and how to apply it in the case. Here, 8th Juror was able to put enough doubt into their minds, by challenging the evidence, to prove to them that they could not be sure enough to convict the defendant.