Dallas, Texas

From the Houston Chronicle of August 13, 2007

Motive a mystery in deadly Dallas freeway shooting

Police said they may never know why a man who wrecked his car along a downtown freeway opened fire on the people who stopped to render aid, killing two before fatally shooting himself.

A Dallas police officer responding to the incident and another passer-by who stopped to help were seriously wounded in the Sunday morning shooting, authorities said.

Police said no one heard any words from the suspected gunman, 20-year-old Nick A. Salinas, of Cedar Hill.

"We may never know," said Dallas police Sgt. Gary Kirkpatrick. "But it's something we hope to find out."

Police identified the shooting victims as Robert Daniel Langston, 22, of Duncanville, and Jesus Reyes Terrazas, Jr., 24, of Dallas.

A woman at Terrazas' home said the family was still grieving and declined to comment.

...

Witnesses told investigators they stopped to help a motorist on the side of Interstate 35 when someone inside the car shot at them. One witness left in his car after the shooter pointed a gun at him, police said.

Terrazas was part of a group of four who saw the accident scene and turned around to help. Someone in the group returned fire, Hale said. Police said they don't believe the return fire hit Salinas. The man was licensed to carry a concealed weapon.

"Certainly I'm sure he was just trying to protect himself," Hale said.

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