790.155 Blood test for impairment or intoxication in cases of death or serious bodily injury; right to use reasonable force.—
(1)(a) Notwithstanding any recognized ability to refuse to submit to the tests provided in s. 790.153, if a law enforcement officer has probable cause to believe that a firearm used by a person under the influence of alcoholic beverages or controlled substances has caused the death or serious bodily injury of a human being, such person shall submit, upon the request of a law enforcement officer, to a test of his or her blood for the purpose of determining the alcoholic content thereof or the presence of controlled substances therein. The law enforcement officer may use reasonable force if necessary to require such person to submit to the administration of the blood test. The blood test shall be performed in a reasonable manner.
(b) The term “serious bodily injury” means a physical condition which creates a substantial risk of death, serious personal disfigurement, or protracted loss or impairment of the function of any bodily member or organ.
(2) The provisions of s. 316.1933(2), relating to blood tests for impairment or intoxication, are incorporated into this act.
(3)(a) Any criminal charge resulting from the incident giving rise to the officer’s demand for testing should be tried concurrently with a charge of any violation of s. 790.151. If such charges are tried separately, the fact that such person refused, resisted, obstructed, or opposed testing shall be admissible at the trial of the criminal offense which gave rise to the demand for testing.
(b) The results of any test administered pursuant to this section for the purpose of detecting the presence of any controlled substance shall not be admissible as evidence in a criminal prosecution for the possession of a controlled substance.
(4) Notwithstanding any provision of law pertaining to the confidentiality of hospital records or other medical records, information obtained pursuant to this section shall be released to a court, prosecuting attorney, defense attorney, or law enforcement officer in connection with an alleged violation of s. 790.151 upon request for such information.
http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0700-0799/0790/0790.html
I can't speak to maritime law and the FL staute posted above, but the court has been pretty consistent that non-consentual, warrantless blood tests are only allowed in a very narrow set of circumstances - an injury accident where the driver was sent for treatment and was either not capable of consent or a blood draw was done for legitimate medical purposes.
That is correct. Mostly. In Florida, you may be required to submit to a breathalizer, or a blood draw, in a very few specific cases. (Usually while driving some vehicle, and someone is killed) Though, the SCOFL has recently started debating if requiring a blood draw is considered a search that would be protected under the 5th Amendment.
It's really not at issue here anyway, since neither the police, SFD or the detectives articulated any suspicion that Zimmerman was impaired at the time of the shooting.
I don't recall that either, though IIRC, they did in fact administer a test, though I don't recall which test.