THE DEATH OF A SEATTLE WINE STEWARD DRIVING HOME PUTS A CITY ON EDGE - WAS IT ROAD RAGE, OR WAS THE GUNMAN A SELF-TAUGHT MURDERER INTENT ON FINDING THE PERFECT MOMENT TO KILL?

"48 HOURS" INVESTIGATES IN "A STUDENT OF MURDER"

Saturday, Feb. 27 at 10:00 PM, ET/PT

Yancy Noll, a well-liked Seattle wine steward, left work one evening in 2012 and headed home. Ten minutes later, he was dead.

Peter Van Sant and 48 HOURS investigate the death of Noll and the trail that would lead police to an unlikely suspect in "A Student of Murder" to be broadcast Saturday, Feb. 27 (10:00 PM, ET/PT) on the CBS Television Network.

On his commute home, Noll stopped at a red light. A BMW pulled alongside him. Shots rang out. Four out of five bullets fired hit Noll in the head, killing him instantly. But why? Was it a case of road rage on steroids, or something else entirely?

"When you prosecute murder cases for as long as we have, the random nature of death is what gets in your head," says prosecutor Kristen Richardson.

"There was a killer on the loose," says KIRO-TV reporter Alison Grande. "Anybody could have been the next target."

The murder grabbed headlines and the attention of the city's commuters. Noll was seemingly an everyman, an easygoing guy who enjoyed hiking with his dog. He had no criminal history, wasn't known as a hothead, and his personal life didn't give police any ready-made clues for why someone would want him dead. His murder was a mystery without any answers.

But a few weeks later, police got a tip that led to Dinh Bowman, a young man described as a genius, a dazzling engineer with his own boutique robotics business. He had entered college at age 12 and was a world-class fencer as a young teen. But as police looked closer, they uncovered evidence which they said revealed that Bowman was good at many things, including murder. What they uncovered would shock investigators and change everything.

Van Sant and 48 HOURS report on the murder and the case against Bowman through interviews with investigators, prosecutors, witnesses to the shooting, and others. 48 HOURS: "A Student of Murder" is produced by Paul LaRosa and Jonathan Leach. Doreen Schechter and Phil Tangel are the editors. Al Briganti is the executive editor. Susan Zirinsky is the senior executive producer.

Chat with members of the 48 HOURS team during the broadcast on Twitter and Facebook. Follow 48 HOURS on Instagram. Listen to 48HOURS podcasts at Play.it.