I couldn't agree more, she is a terrible "witness".. and completely bias to a man who is absolutely terrible.
I know women are socialized to be empathetic and all but that doesn't mean moral relativism is cool. I hope she gets some perspective. Frankly, I'm worried about the "healthiness" of their relationship. She seems really torn between feeling for Tara and her family versus feeling for a man who didn't just dispose of Tara's body--he obliterated her--assuming he was telling the truth about Ryan being her killer. It's hard for me to trust his account given he wasn't even the one to come forward.