What are some scientific errors associated with DUI breath tests?

What are some scientific errors associated with DUI breath tests?

Neil Shouse (Defense Attorney) gives expert video advice on: What are 'chemical tests' as they are used in a DUI arrest?; What is the 'implied consent law'?; When does a motorist have the right to refuse a chemical test during a DUI arrest? and more...

There are a number of scientific errors associated with breath tests. One is there could be residual alcohol in the throat or the mouth that is blown into the machine that causes a falsely high reading. There can be other chemicals in human breath that can be mistaken for alcohol and cause the machine to render a particular BAC reading when the person has much less alcohol in their breath, or no alcohol in their breath. The machines are not foolproof and oftentimes can register an erroneous of falsely high reading.