A drug trafficker who placed a pipe bomb in a gift-wrapped microwave oven in a plot to kill two potential murder witnesses was executed Wednesday for the 1992 death of a Florida highway trooper who became the unintended victim.

Paul Augustus Howell, 48, was pronounced dead at 6:32 p.m. following a lethal injection at the Florida State Prison in Stark, the office of Gov. Rick Scott said in an email.

U.S. Supreme Court denial orders are here, here, and here.