A quick search brought this up, so maybe it could be traced back to you if you consented to an anal swab
Can you get DNA from poop?
Yes, there is DNA in “poop”. During excretion, cells from the lining of the rectum tend to slough off and there is DNA in these cells. In addition, fecal matter has a large amount of bacteria in it. The bacteria of course have DNA as well.
My bad