Sorry if this has already been posted, but I think we might be able to reach that number... I only have one so... (Don't forget to number your knowledge ) 1. Luminol shows dried blood and turns it bright blue.
1. I learned that you can lift fingerprints from shell casings using Smith's Solution. 2. I learned that sulfur can be used to make molds of footprints( CSI:Cold Burn)
I learned that there are flashlights which have different colours to make prints and other things visible.
Adding to this: 13) That you can fake a fingerprint using a mold & epoxy, and oil. Blood can then be dripped onto it to give the impression of a bloody fingerprint.
14) I Learned that Sperm can survive at least 4 hours in open air before bacteria eats away at the tails. (CSI:LV episode "Boom")
16) Insects can be a lot of help for determining T.O.D (in real life, it's called forensic entimology, it's fascinating!)