HOUSTON -- Friends, family members and co-workers pleaded for the public's help Friday in finding the shooter responsible for a senseless crime that killed one man.

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Family, Friends Plea For Help In Road-Rage Killing

Robert Pietsch, 33, was killed by a single gunshot wound to the head while driving his sport utility vehicle Sunday. His SUV then crashed into a building on Shephard at Richmond.

"The loss that you feel in this type of situation is (something) you can't get over," Pietsch's longtime friend Duane Murphy said. "I can't imagine what type of person could do something to take away what we had and what we shared."

Investigators and witnesses said he might have been playing road tag, cutting off another driver in the area.

Investigators said Pietsch was shot and killed by an unknown assailant Sunday around 5:30 p.m. as he was driving south on the 3400 block of Shepherd.

According to Houston police Sgt. Tom Ladd and witness accounts, Pietsch stopped at Richmond Avenue to wait for an ambulance before proceeding through the intersection. As he moved through the intersection, a single gunshot struck him in the head and killed him. His car careened off the road into an adjacent building.

One passenger was in the vehicle at the time of the incident.

The victim's employer, Heavy Construction Systems Specialists, Inc., is offering a supplemental reward of up to $5,000 in addition to the Crime Stoppers of Houston reward of $5,000, bring the total reward to $10,000.

"It's devastated the family. It's devastated us, so we are trying to do what we can do o take this person off the street," HCSS vice president John Davis said.

Witnesses told investigators that the other vehicle involved in the incident is a white four-door compact vehicle with a very loud muffler.

Anyone with information should call Crime Stoppers at (713) 222-TIPS.