Read the article: A judge said police can search the DNA of 1 million Americans without their consent by Joseph Kaiser
The Supreme Court has ruled that police can take DNA samples from anybody without their consent and I think this has both positive and negative side. The advantage is that with this, it is possible to connect people with other unsolved crimes using this DNA. For example, according to the article a police officer tracked down a suspected Golden State Killer by uploading crime scene DNA to GEDmatch. Forensic genealogy can help in solving cold criminal cases. On the other hand, this ruling can also lead to false accusations and privacy issues. Also, those who fail to take the DNA test could be suspect.