@ntt1 Not too long ago, I was looking for updates on John Clinton Doe (aka Rock County John Doe), who DNA Doe Project identified in Feb 2019. An article from Aug 2019 mentioned that as far as LE is concerned, the investigation into his identity is still ongoing. They need to conduct their own independent investigation.
I'm *guessing* what usually happens is LE uses the matches from DDP as supporting evidence and tries to line up the match with other evidence (claims of relatives; documentation from family like old photos, birth certificates, etc). If everything lines up, they feel confident to officially claim someone is a match. I can imagine there are numerous scenarios where this would take a very long time. It has been long-rumored that Rock County John Doe was from a foster home. If true, this could make identification virtually impossible at this time. MOO.
So just because DDP makes an identification claim, does not automatically mean that LE instantly closes a case.
Honestly, I think it's good. If you are going to announce an identity, you want to make sure beyond any doubt whatsoever that that person is who you think they are.