I have a few thoughts based on what we've seen of the LE report so far.
IF MJD was a prostitute, I believe her tatoo was some kind of "brand."
One place in the report says "subj has irreg hmde drk blu tat left of mid line abv lft brst size qrtr"
I'll assume that means "The subject has an irregular homemade dark blue tattoo left of mid line above the left breast the size of a quarter."