katy_did
Master Poster
- Joined
- Feb 4, 2010
- Messages
- 2,219
My theory which I have posted before is that the investigators used Luminol on December 18 specifically to find bare footprints which Amanda told them would likely be there on December 17 when she recounted the story of using the bloodied bathmat to scoot from the bathroom to her room the morning after Meredith's murder. This theory is backed by the fact that known locations that should have been Luminol positive such as the shoeprint at marker 3, the unmarked shoeprint near the pink bag and the rusty area under the radiator were not photographed with Luminol.
The process of collecting a dry stain involves swabbing it with a moistened blotter paper. This was done at marker 2 where we have before photos and after photos in both normal light and highlighted with Luminol.
The way to tell if DNA is associated with a suspected stain is to take a substrate sample nearby but outside the stain area using the same method. such controls were never done because it is almost certain that DNA would be found and a positive hit on a negative control is much more difficult to hand wave away.
I agree about why they did it and that they already knew what they would find, based on what Amanda had said. What I don't understand, though, is why didn't the cleaned up shoe print react to luminol? Or are you saying it might have but they didn't photograph it?
Agreed on the negative controls; the closest thing we have to those is the DNA findings at Raffaele's place, which prove it isn't unusual to find DNA on the floor of an apartment from the people who live there.