An Air Force Academy graduate and decorated test pilot, he commanded or piloted five space shuttle missions. NASA even turned to him for leadership as it was picking up the pieces after the Columbia disaster in 2003.
Now, a decade after his retirement from the space agency, the 59-year-old Halsell is in a new kind of danger: He is charged with murder after an early-morning car wreck Monday killed two young sisters on a lonely stretch of highway in Alabama.
State police said alcohol and speed may have been factors in the crash.
Halsell, who lives in Huntsville, was arrested and released from jail on $150,000 bail. Court records weren't available Tuesday to show whether the retired Air Force colonel has a lawyer. A call to his home was not immediately returned.
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The girls' father, Pernell James, 37, had driven to Texas to pick them up at their mother's home in Houston for a summer-long visit to Alabama, said Dennis Stripling, mayor of the town of Brent.
The father was expected to be released from a hospital Tuesday. A woman in his car, Shontel Latriva Cutts, 25, was listed in fair condition.