SAN ANTONIO -

It has been three years since someone shot and killed 17-year-old Paul Deleon and investigators are still looking for the man who fired the fatal shot.

The Highlands High School senior was in a car with his older brother and younger sister when someone pulled up next to them at a traffic light and fired a shotgun blast into the car on Dec. 19, 2009.

"He should be here right now, there's no reason why he shouldn't be here," said Norma Rodriguez, Deleon's mother.

The last time Rodriguez saw her son, he was leaving with his older brother, who was taking a friend home. Deleon and his 14-year-old sister just wanted to tag along for the ride. It was supposed to be a short trip, but Deleon never came home.

Just five minutes from home, someone in a tan Nissan Frontier pickup truck pulled up to the car as they waited for a light at the intersection of Fair and New Braunfels.

Deleon was sitting in the passenger seat and rolled his window down to talk to the man in the truck, who appeared to need directions. Instead of helping the man, the driver pulled out a shotgun and pointed it at Deleon's face.

"My older son said, 'Oh my God,' and he stepped on the gas. He still shot at the car. He shot the back window, and it hit my son in the back of his head," Rodriguez said.

The shooting happened so fast, no one inside the car got a good look at the suspect, just a glance. But with the help of hypnosis, Deleon's older brother was able to recall enough detail to help police create a sketch of the suspect.

"They brought him back to that night to pull out the glance that he saw him that fast," Rodriguez said.

The drawing hasn't produced any new leads, just more questions. As Rodriguez prepares for another candlelight vigil to mark the night she lost her son, she's left clinging to the hope someone will come forward with information to solve the crime.

"I'm hoping that it's weighing on someone's heart that knows, and I just want them to know that they need to do the right thing because we don't have any closure for my son," Rodriguez said.

Crime Stoppers is offering up to $5,000 for information leading to an arrest in this case. If you have information about the murder of Paul Deleon call Crime Stoppers at 210-224-STOP (7867).

To read more stories done by Tim Gerber, click here.