For the source text click/tap here: Sanhedrin 33
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One of the differences between dinei mamonot (monetary cases) and dinei nefashot (capital cases) that is taught in the Mishna (32a) is whether we will reopen a case when someone suggests that new evidence is available. In dinei mamonot we will always be willing to reopen a case; in dinei nefashot we will only do so if the original decision found that the defendant was guilty. If he had been found innocent we will not reconsider the case, even if new evidence is forthcoming.
We explore this idea of justice and being equable.