@JBB4768@SueOC_NBCBoston Because the prosecution wasn't so prohibited. You're likely talking about Evid.R. 404 but the prohibition only limits the use of the evidence--it can't be used "to prove that on a particular occasion the person acted in accordance with the character or trait."
@seanmdav Sean, unsurprisingly, is misleading. When you look at the full context of clip the juror is referring to mental state. That is why the juror admits LC committed the act.
@Geauxtgrs66@Bederowlaw@SueOC_NBCBoston There is nothing about "inserting" information not part of the trial.
Plus, jurors "are the sole and exclusive judges of the facts, and in determining what those facts are, you should draw on your own common-sense and life experience." Instruction 1.120.