A Texas mother plotted for weeks to kill her husband and two young daughters but not everything went to plan, police say. Sarah Henderson, 29, has been charged with capital murder in the deaths of her two daughters, 7-year-old Kaylee and 5-year-old Kenlie, who were shot in the head early Thursday in Maban, south of Dallas, the Washington Post reports. Police say husband Jacob Henderson called 911 at 11:30pm Wednesday to say his wife was "freaking out." He called minutes later to cancel the emergency call, but called again at around 2:30am Thursday with disturbing news. "She was asleep when I went to sleep last night and I woke up, she come in there and she said 'Babe, I just shot the kids,'" he told dispatchers.
"I didn't want to believe it and I went in there and they were dead," Jacob Henderson told dispatchers. Police say he is the stepfather of the two girls and has been cooperating with authorities. Sarah Henderson is now in jail under suicide watch and faces capital murder charges, reports the Fort Worth Star-Telegram. Police say she planned the killings and would probably have killed her husband as well, but her gun misfired. "Over the last 24 hours, the investigation shows that she planned these murders for at least the last two weeks," County Sheriff Botie Hillhouse told reporters Friday. "It appears she also intended to kill her husband, but the entire crime did not go as planned." (Read more Texas stories.)