Dang! There goes another potential film noir plot down the drain. It's happening in real life.
The Beeb has the full story; here's the start of it:
Twins' DNA hinders France sexual assault investigation
Police who are investigating a series of sexual assaults in the southern French city of Marseille have arrested identical twin brothers.
The 24-year-old unemployed delivery drivers, named locally as Elwin and Yohan, were placed under investigation on Friday.
Officers say they are sure that one of the two men carried out the attacks, but that they do not know which.
Standard DNA tests are unable to differentiate between their DNA.