I don't know if someone has already answered this or not, if they have, sorry. You need to go back to where you found the stomach matter, which is near the bridge, it will be a tiny thing so look carefully, its rather at the topWolfeSanders said:
Hi there. I just got the CSI: Miami PC game and I am already stuck on the first case. I have collected the stomach matter from near the bridge but I asked my friend for help and he said that there is something like plastic bits under the matter that you have to collect too. I can't collect those bits and I was wondering if someone could help me out with this. I would really appreciate it.