US

Oklahoma carries out lethal injection; inmate shows no obvious signs of distress

  • Media witness Sean Murphy, right, of the Associated Press, gives a report of the execution of Charles Warner to the rest of the media in McAlester, Okla, following the execution, Thursday, Jan. 15, 2015. With Murphy are, from left, the other four media witness, Parker Perry, Tess Maune, Abby Broiles and Morgan Chesky. (AP Photo/Sue Ogrocki)

    Media witness Sean Murphy, right, of the Associated Press, gives a report of the execution of Charles Warner to the rest of the media in McAlester, Okla, following the execution, Thursday, Jan. 15, 2015. With Murphy are, from left, the other four media witness, Parker Perry, Tess Maune, Abby Broiles and Morgan Chesky. (AP Photo/Sue Ogrocki)  (The Associated Press)

  • Cecilia McAdams addresses reporters outside Florida State Prison after the execution of Johnny Shane Kormondy. Kormondy, 42, was the ringleader of a 1993 Panhandle home-invasion robbery that left McAdams’ husband, Gary McAdams, dead, in Starke, Fla., Thursday, Jan. 15, 2015. (AP Photo/Jason Dearen)

    Cecilia McAdams addresses reporters outside Florida State Prison after the execution of Johnny Shane Kormondy. Kormondy, 42, was the ringleader of a 1993 Panhandle home-invasion robbery that left McAdams’ husband, Gary McAdams, dead, in Starke, Fla., Thursday, Jan. 15, 2015. (AP Photo/Jason Dearen)  (The Associated Press)

Oklahoma has put to death its first inmate since a botched execution last year prompted the state to rewrite its lethal injection protocols.

Charles Frederick Warner showed no obvious signs of distress Thursday night after the lethal drugs were administered. He was pronounced dead after 18 minutes.

His punishment came just after another inmate was executed in Florida.

Warner's execution was the second time Oklahoma used the sedative midazolam as part of a three-drug method that had been challenged in appeals as presenting an unconstitutional risk of pain and suffering.

It was first used in the execution of Clayton Lockett, who began writhing on the gurney and trying to lift his head after he'd been declared unconscious.

Among other changes since then, Oklahoma has increased the dose of midazolam.