The debate in this article is whether it should be admissible to allow using related DNA for crime investigation. Hank Greely is quoted in several paragraphs.

Henry T. Greely, a professor of law and genetics at Stanford University, says the legal and policy arguments for not doing such searches are that they may reveal family secrets; they may violate promises of privacy or confidentiality to those who gave DNA samples voluntarily; they may invade the suspects’ privacy, particularly if the person hasn’t been convicted of any crime; and they may put people at risk of being investigated simply because they have a relative who has been convicted of a crime. And he says those arguments are all quite weak. ...