That's why police have to practice doing these tests. No evidence means no conviction. Never assume a police officer's actions were legal merely because they were the actions of a police officer. It doesn't take much education to be a cop. In contrast, being a lawyer takes four years of college and three years of law school.
Lawyers know more about the law than cops do.
Some courts have dismissed the refusal proceedings, concluding that the defect is fundamental and deprives the circuit court of jurisdiction over the refusal proceeding. Before police may legally ask you to submit under the Implied Consent Law to a breath, blood, or urine test, they must first provide you with a warning and statement of rights specified by Wisconsin statute. This form must be read to you, and read to you before you're asked to submit to a test. If it isn't, you're not legally required under the Implied Consent Law to submit to any test, and you have a defense to a refusal proceeding if you refuse the test. The form must also be read completely.