An anonymous reader writes: Private companies are now receiving demands for genetic information in their DNA databases from law enforcement. Ancestry.com and 23andme report a total of five requests from law agencies for the genetic material of six individuals in their growing databases of hundreds of thousands of individuals. For example, Ancestry.com sent data belonging to a person being investigated for the murder and rape of an 18-year-old woman in Idaho Falls, Idaho. The other four court orders belonged to 23andme, which was able to persuade investigators to withdraw the requests. Even though these requests are considered rare, many experts in the field are concerned DNA turned over for medical, family history research or other highly personal reasons could be misused by investigators, and that this could be the start of a trend.