Both Ancestry.com and 23andMe have received requests from law enforcement agencies for access to their DNA databases, the Associated Press reports.

Together, the consumer genetics companies have fielded five such demands. Ancestry.com gave police access to one person's information for a rape and murder case in Idaho, while 23andMe persuaded officials to withdraw four requests.

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US News & World Report writes that genetic testing of lung tumors can help identify treatments for patients.

A team of researchers plans to sample Loch Ness for environmental DNA, according to Newsweek.

The New York Times writes about the appearance of mosaicism in healthy people.

In PNAS this week: insecticide resistance patterns Anopheles gambiae mosquito, transcriptome patterns in Pseudomonas aeruginosa during infection, and more.