Doesn't solve my problem. I want to see a test for human blood, not a presumptive test. This testing only shows that garment isn't covered with horseradish.
I thought the test used showed that if they were able to extract DNA from the spots that tested positively presumptively that it was not from other bodily things (you've said it could be nose stuff or saliva, I believe) or am I misreading :
"Q. Are you using these substrate controls to allow a later analyst to determine if the jacket itself has something in it, as opposed to the blood staining, providing any later genetic information?"
At any rate, just wanted to throw it your way.