The US Supreme Court denied two petitions for a stay of execution and a petition for writ of certiorari in the case of Florida serial killer Manuel Pardo (here and here).  No dissent is noted.  Earlier today, David Ovalle had this story on the case in the Miami Herald.  The execution was originally scheduled for 6:00 p.m. EST, but it was delayed for the SCOTUS decision.

Update:  The execution was completed at 7:47.  Jon Silman has this story in the Gainesville Sun.