What is the exclusionary rule when an arrest is not made coincidentally with a search for blood samples?

The exclusionary rule, nevertheless, is invoked because an arrest was not made contemporaneously with the lawful search. No convincing argument is made that any rights or interests of the defendant were sacrificed by the delay. Schmerber v. California, 384 U.S. 757, 86 S.Ct. 1826, 16 L.Ed.2d 908 (1966), did recite that an arrest had been made coincidentally with taking a blood sample, but in my view this was simply a way of stating that there existed the probable cause that is always the prerequisite for the seizure of evidence in exigent circumstances. Cupp v. Murphy, 412 U.S. 291, 93 S.Ct. 2000, 36 L.Ed.2d 900 (1973), seems to me to have established the proposition that an arrest is not a precondition for a search under exigent circumstances, even though the search is intrusive in character.