These are valid concerns. I share them, which is why I have started my search as broad as possible. I should be able to contact all of the shops on my list by this weekend, and I am not sure what to do after that. I can either start expanding the contact radius to Charlotte, NC and Atlanta, GA, or I can hone in on certain South Carolina towns. The UID could be white and from NYC and I could be 100% off track, however in web scraping I have to decide some limiting factors on my search, which is why I'm going with the "UID is from SC and likely Asian/Hispanic with a stronger possibility of being Filipino" route. Luckily I am not LE and just a young adult who likes coding, social media analysis, investigating, and is bored because I can't go out due to the pandemic haha. If I make mistakes in my search, it will not cause harm.
There are tattoo magazines, newsletters, events, shows, ink distribution centers:
Perhaps you can reach many more tattoo artists that can hang photo of the tattoo of victim at the next up & coming conventions, gatherings, events, etc.:
Does LE have a poster made you can copy and mail to such groups with hopes of reaching larger groups by their ability to share this information too?