I believe Daniel Sturkie was killed (or mortally wounded) at the Battle of Seven Pines. The 6th Alabama Infantry was very heavily engaged and losses were severe. The following is a portion of Colonel (later General) John B. Gordon's account as found in "Reminiscences of the Civil War":

"The loses were appalling. All the field officers, except for myself, had been killed. Of forty-four officers of the line, but thirteen were left for duty. Nearly two thirds of the entire command had been killed or wounded." page 58