GEDMatch, a site which has helped solve around 25 cold criminal cases, has changed its terms and conditions to opt its users out from searches by law enforcement
Source:
https://www.newscientist.com/article/2203857-dna-database-opts-a-million-people-out-from-police-searches/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home