Latest tool that helped lead Charleston police to home invasion, sex assault suspect: a vacuum

…Chief Greg Mullen of the Charleston Police Department said the victim could tell only that her assailant was a black man. Detectives had no other clues at the investigation’s start.
But the special wet vacuum, which the city recently received through a $50,000 federal grant under the Violence Against Women Act, changed that, he said. The M-Vac system collects trace amounts of DNA and other evidence when traditional methods might fail…