Without a void in the blood spatter then we know that she wasn't killed on the ground floor!
And how about that handprint? Any matches?
Nothing yet, but we're running it through our system.
We're finally getting somewhere.
Of course we are. It's me helping you after all. Now head in there, I'm gonna check on those fingerprints.
Well, as a serologist it's my job to study blood, and today we're gonna be testing that agglutinated blood sample you brought me yesterday.
Afternoon Dr. Smith. I don't think I've been down to this side of the of the station before, what're you doing here?
This way we can match blood with all different types of antibodies, and find a match. a special protein effects this as well. This protein dictates whether the blood is positive or negative. Once again the antigens kill anything that doesn't match. After I ran the tests I can tell that this blood is type AB negative
So how are we doing this?
Well, we're gonna take these erythrocytes, or red blood cells and do some blood typing. All blood has set antibodies defining what type it is. They also produces antibodies which protect it. Blood only mixes with the same type, otherwise it gets attacked with the other sample's antibodies.
Stan!!! We got him!!!
Looks like we finally got you! The blood typing even matches his file. Good luck explaining this to the jury.
Thank god that fingerprint came through. John Doe. 12 accounts of aggravated assault, and full time worker as a chimney sweep.