Are Drunk Driving Breath Tests Reliable?

When it comes to drunk driving breath tests, there'stime the defendant was pulled over. The prosecution
been an ongoing debate between drunk drivingmust provide proof that the ethyl alcohol is responsible
defense lawyers and law enforcement. The argumentfor the results produced by the breath analyzing
is that breathalyzer tests are unreliable because theseinstrument.
machines often detect other chemicals in the bodyCurrent scientific research published has shown that
and mistake them for ethanol, or ethyl alcohol, which isresults from breath alcohol analysis are not enough to
found in alcoholic beverages. According to the breathbe used in our courts. Furthermore, there have been
test, someone could have a high blood alcohol levelquite of few studies done to prove that breath tests
(B.A.C.), but in actuality there is very little if any ethanolare not as reliable as blood tests. In one study,
in his body.members of the toxicology section of the Wisconsin
The most widely used breath tests used today areState Laboratory of Hygiene found that only 33
infrared breath analyzing instruments. They are not aspercent of the breath test results correlated with
accurate or reliable as blood tests, but have beencorresponding blood tests. What is really interesting
accepted as standard instruments to detect ifand noteworthy about this study is that in 11 of the
someone is drunk. The problem with these instrumentscases, the defendant was shown to be intoxicated
is that they are not designed to detect the molecule ofusing one of the tests but not intoxicated when using
ethyl alcohol. Most breathalyzer tests can only find athe other.
presence of a part of that molecule. The breathalyzerThe question we should be asking ourselves is: Who
test assumes that the methyl group is part of an ethylreally stands to gain from these breath analyzing
alcohol compound. Now, imagine all the differentmachines? Is is the manufacturers who sell these
compounds that could be found on a person's breathmachines to the government? How do we know that
and think about the possibility of the breathalyzerthese manufacturers are creating machines that are
instrument mistaking a combination of theseabsolutely perfect? We have to remember that these
compounds as ethyl alcohol.breath analyzing machines are made by man. These
The interesting thing is that approximately 70 to 80devices are run by computers and we all know that
percent of these compounds contain methyl groups.computers can often break down or have technical
So, in order for someone to be convicted for drunkissues. Law enforcement says that we should put our
driving, the prosecution must show beyond a reasonfaith in these machines to provide accurate results, yet
of a doubt that ethyl alcohol was in the body at theanyone with common sense knows otherwise.