I suspect they only do that in cases where a driver faces more than just a DUI charge — like vehicular homicide, for example. In the Toger Woods case there was no reason to do a blood test because his refusal to take the breathalyzer test was basically a guilty plea to the DUI charge.
Nope. In many states, including mine, they will get an order for a blood draw in every instance where a DUI suspect refuses a breath test.
Not here in Colorado.
Colorado law requires you to take a breath or blood test if you are arrested for a DUI, underage drunk driving (UDD), driving while impaired (DWAI), or are considered a “habitual user” of controlled substances. Colorado’s “expressed consent” law says that if you are lawfully arrested by an officer who has probable cause to believe that you have been driving under the influence, then you consent to taking a chemical test of your blood or breath for the purpose of determining your blood alcohol content (BAC). If the officer believes you may be under the influence of drugs, then you also consent to a urine test.