I've got a character under criminal investigation for the kidnapping/possible murder of a girl. He's innocent, but I'm trying to figure out just how incriminating some incriminating evidence would be.
What I want to know --
- Would menstrual blood (smeared on a towel) be distinguishable from "normal" blood from a cut? Assume it's a few days old, and there's none of the dark eggy bits, just blood. Would testing be able to prove it was menstrual?
And -- would testing be able to determine how long the blood had been on said towel? This one doesn't matter quite as much, I'm just wondering.