The example given did not involve operation of a motor vehicle.<quoted text>Get involved in a fatal car crash and see what happens. Damnnnnnnnnnnn, Trainman, did you ever leave Mamma's house in all your seven decades? An unarmed dead teenager IS probably cause.
Given the severity of drunk driving laws, most attorneys advise refusing a blood test if you know you are over the limit, even if that means loss of your license.
"The right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated, and no Warrants shall issue, but upon probable cause, supported by Oath or affirmation, and particularly describing the place to be searched, and the persons or things to be seized."