Does a Grand Jury Subpoena for Blood Violate the Fourth Amendment?
The integrity of an individual's person is a cherished value of our society. That we today hold that the Constitution does not forbid the States minor intrusions into an individual's body under stringently limited conditions in no way indicates that it permits more substantial intrusions, or intrusions under other conditions.
22 Am. J. Crim. L. 327 (1995)