Researchers say a flaw they've found in a breathalyzer widely used by law enforcement could affect the test results and put thousands of DUI convictions in question. ZDNet reports the source code used in the Draeger Alcotest 9510 breathalyzer can produce incorrect results. Defense attorneys have long believed the breathalyzer could be faulty, and a Washington attorney hired a software engineer and a security researcher to investigate the suspected flaw. The video below, courtesy of ZDNet, explains the problem and the legal threats Draeger made over revealing the research. You can read more about the story here.