Dog is man's best friend, but cats can fight crime. Thanks to their tendency to groom and shed, household cats carpet a home—and anyone who sets foot in it—with DNA evidence. Kitty forensics have already led to one murder conviction after hair from a victim's cat was found on the killer's jacket. "Cat fur obtained from a crime scene has the potential to link perpetrators, accomplices, witnesses and victims," says an expert.
Cats are ideal assistant investigators because their fur is a ready source of short tandem repeat and mitochondrial DNA. Scientists have established a feline DNA database that maps out the location of unique markers that make forensic analysis possible, Discover reports. And don't worry, dog lovers: Adding canine DNA to the database is under consideration.