DNA shenanigans *spoilers*
The big news now is that the blood on Cam's hypodermic needle was not a match with the Silver Bells Killer, but there is a familial match with the killer's blood.
We've already seen Brady the detective take a hair from his wife's brush that his wife had planted on the brush (rolls eyes!). So bogus test results aren't out of the question.
Dana the DNA analyst is a little strange. If she was willing to lie and take the blame for messing up the hair analysis for Brady for a "boat," maybe someone else got to her too?
Is it possible that when Brady gave his boss the needle with his brother-in-law's blood on it that someone tampered with it or with the results?
Just a thought.