I am really getting a bit p*****d off with this thread. The guy is innocent.
bjcc
The breath test machines are obviously totally unsuitable for levels below 20 as they cannot differentiate between acetones and alcohol. This means that they should not be used if the level is of that order in which case they should let the accused party get on with his job. When they have a suitable detector they will be able to use them for all cases.
At the moment it is a random unfair spiteful process which does not reflect well on the officers using it.