4A Fla Jur Automobiles and Other Vehicles § 409§ 409 Establishment of corpus delicti; evidence
"The State may not rely on the admission of the defendant that the defendant was the driver of the vehicle without first establishing the corpus delicti. A critical element of the corpus delicti of the offense of driving while intoxicated (DUI) is evidence that the defendant was driving at the time the offense was allegedly committed. Thus, the state was required to prove that defendant's blood alcohol level was .08 at the time he was driving, rather than at some point during the night of the accident, to convict defendant in a prosecution for driving under the influence (DUI)."