Many years ago in the 1980’s there was a push to have families create a child identification kit at home to speed the process if a child went missing. In that kit was a recent photo, fingerprints, and an old toothbrush and hairbrush in a baggie to be used for DNA.
I volunteered to help get kids fingerprints on the card. It was a very strange experience in my 20’s to take the fingerprints of little children for a card to be used to identify them if they went missing, or had passed away and were not easy to identify.
I was mindful of this when my kids came along to keep recent photos but I did not have my kids fingerprints done.
A Google search and I found it- evidently it is still going on today.
centerforthemissing.org
JMO