A Gunman Demanded to Know Ex-Wife's Whereabouts

 A man charged with killing four children and their parents forced his way into the family's suburban Houston home, tied them up and shot them in the back of the head when they refused to tell him where his ex-wife was, authorities said Thursday.

The lone survivor of the attack, the slain couple's 15-year-old daughter, suffered a fractured skull when a bullet grazed her head. She played dead and called 911 after Ronald Lee Haskell left the house, prosecutors revealed at a court hearing.

A day after the slayings, investigators slowly built a picture of Haskell, who was the couple's estranged brother-in-law.........................