It can occur when the members of the jury believe that to find the defendant guilty would be unfair or unjust or would demand a sentence, which the jurors do not wish to be associated with e.g. death penalty.

JURY NULLIFICATION: "Jury Nullification is the jury's decision to exonerate a defendant ."
Cite this page: N., Pam M.S., "JURY NULLIFICATION," in PsychologyDictionary.org, May 11, 2013, https://psychologydictionary.org/jury-nullification/ (accessed February 25, 2020).