Guilt By Machine: Do Breathalyzers Work?Season 1 Episode 18 - Guilty By Machine

The breathalyser is one of the most widely used forensic tools in law enforcement, with more than a million Americans arrested each year for driving under the influence of alcohol. However, these devices are black boxes - how they work is guarded as closely as a nuclear secret. For years, researchers and defence attorneys have tried to discredit them, highlighting serious flaws with the way the machines are programmed and maintained. Now, a growing number of states are taking notice, and they’re throwing out breathalyser evidence in tens of thousands of cases.

Guilt By Machine: Do Breathalyzers Work? was broadcast on SBS ONE at Sunday 17 November 2019, 13:00.