Tonight's episode of "The Closer" has faulty legal premise

If you DVR'ed The Closer tonight, this is a spoiler alert. You do not want to read this post until you've watched it.I hate when tv shows depend upon an absolutely incorrect legal premise. That's what happened on tonight's Closer. The murderer is motivated to have the victim killed because the victim shows up and says she is the biological half-sister of the murderer who was adopted as an