@O.C.G.A. 16-10-94 (2010)
(a) A person commits the offense of tampering with evidence when, with the intent to prevent the apprehension or cause the wrongful apprehension of any person or to obstruct the prosecution or defense of any person, he knowingly destroys, alters, conceals, or disguises physical evidence or makes, devises, prepares, or plants false evidence.
So what do you think now?
How did he conceal his BC? He refused to participate in an administrative hearing and was prepared to accept a default judgement.
Since he willing to accept a guilty verdict then how can you say he was obstructing the prosecution? He made the prosecution’s job easier.