HUNTSVILLE, Texas -- A Texas man who fatally shot a convenience store clerk was put to death Wednesday evening, becoming the 30th person executed in the U.S. this year and the first since Tennessee's failed attempt to administer a lethal injection to Christa Pike.

Jamaal Howard, 46, was pronounced dead at 8:03 p.m. Wednesday after receiving a fatal dose of pentobarbital at the state prison in Huntsville.

He was convicted of killing of Vickie Swartout, 42, in a 2000 store robbery caught on surveillance video.