Bush v. Schiavo, Florida Supreme Court, September 23, 2004. Read the opinion here [PDF]. Excerpt:

Under procedures enacted by the Legislature, effective both before the passage of the Act and after its fifteen-day effective period expired, circuit courts are charged with adjudicating issues regarding incompetent individuals. The trial courts of this State are called upon to make many of the most difficult decisions facing society. In proceedings under chapter 765, Florida Statutes (2003), these decisions literally affect the lives or deaths of patients. The trial courts also handle other weighty decisions affecting the welfare of children such as termination of parental rights and child custody. See § 61.13(2)(b)(1), Fla. Stat. (2003) ("The court shall determine all matters relating to custody of each minor child of the parties in accordance with the best interests of the child and in accordance with the Uniform Child Custody Jurisdiction and Enforcement Act."); § 39.801(2), Fla. Stat. (2003) ("The circuit court shall have exclusive original jurisdiction of a proceeding involving termination of parental rights."). When the prescribed procedures are followed according to our rules of court and the governing statutes, a final judgment is issued, and all post-judgment procedures are followed, it is without question an invasion of the authority of the judicial branch for the Legislature to pass a law that allows the executive branch to interfere with the final judicial determination in a case. That is precisely what occurred here and for that reason the Act is unconstitutional as applied to Theresa Schiavo.

Reported in JURIST's Paper Chase here.