Breath Test Refusal Lands Man in Prison for 3 Years?

At least we don't live in Akron, Ohio.  According to this report, an Ohio man was convicted and sentenced to 3 years in prison for Tampering with a Government Document for failing to give a breath test after his DWI arrest. 

Am I missing something here? How is refusing a breath test tampering with a government document? Doesn't it seem that you would have to actually alter, change, destroy, or manipulate a document in order to tamper it?  Even more basic, wouldn't there have to be a document already in existence or one that you fraudulently made to alter or tamper with?

After the verdict, the prosecutor apparently said, "the law is now clear that drunk drivers cannot refuse to take a breath test,  It is mandatory, and the jury agreed that Mr. Simin broke that law and deserved prison time. Bottom line: It doesn't pay to refuse to cooperate. It will increase your sentence."

Since when did our Constitution require us to aid in a police investigation?  Is the Fifth Amendment to the United States Constitution still around?  Funny, I thought we were all protected in our right to remain silent and not aid the Government in convicting us.