Texas woman's death, morphine leave unsolved puzzle

Someone kidnapped a Fort Worth teen in 1974 and, before killing her injected her with morphine. Carla Walker, 17, disappeared from a Fort Worth Bowling alley after being kidnapped in February 1974. Her case remains an open mystery to police. less Someone kidnapped a Fort Worth teen in 1974 and, before killing her injected her with morphine. Carla Walker, 17, disappeared from a Fort Worth Bowling alley after being kidnapped in February 1974. Her case ... more Photo: Fort Worth Police Department Photo: Fort Worth Police Department Image 1 of / 65 Caption Close Texas woman's death, morphine leave unsolved puzzle 1 / 65 Back to Gallery

Whoever snatched 17-year-old Carla Walker from a bowling alley parking lot in Fort Worth in February 1974 had access to an unusual drug - morphine.

The use of that heavy sedative on Walker has been a truly bizarre part of the puzzle about what happened to Walker in the three days between when she vanished and her body was found in Texas.

Police say someone grabbed Walker, described as petite with a full head of blonde hair, from the passenger seat of her boyfriend's car.

COLD CASE: 15 years after student's death, a killer is still free

The boyfriend told police someone hit him over the head and, when he recovered, Walker was gone.

It would be three days before Carla's body was recovered from a culvert near Benbrook Lake.

Walker showed signs of being beaten, raped and tortured during her captivity. The medical examiner later discovered that someone had injected her with morphine, a powerful sedative that isn't a common street drug and not everyone would have access to.

STILL MISSING: Texas teen went for a run 15 years ago, but never came home

The case remains active with the Fort Worth Police Department.

Walker's sister, Cynthia Stone, hopes it can be closed soon.

"I want justice for her," Stone told KXAS-TV. "It's time."

>>>Click through the gallery to see details of other unsolved homicides in Harris County.