A friend of the man killed in an apparent road-rage shooting in Seattle's Roosevelt District says it's only a matter of time before police track down the gunman.

Yancy Noll was gunned down at the corner of 15th Avenue Northeast and Northeast 75th Street Friday evening.

"Somebody knows something. Please come forward," Patty Hynds, a friend of Noll, told KIRO 7 Eyewitness News.

On Tuesday, Hynds came to the scene of the shooting, carrying a rose. Hynds wanted to pay her respects to Noll, but she also said she wanted to make sure his story is told until someone is caught.

"They're going to find you, and if you're an accessory to this by hiding the person, you're going to be in trouble too," Hynds said.

Police said Noll, 42, was shot when someone pulled up alongside his car after a possible road rage incident and opened fire.

Two days later, police released surveillance footage showing a silver BMW Z-4 convertible that police believe is the suspect vehicle. The BMW involved in Friday's shooting may have recent body damage, including a broken-out passenger side window.

With such a detailed description of the shooter's vehicle, reporter Michelle Millman called the Department of Licensing to find out how many BMWs like it are registered in King County.

The Department of Licensing of Licensing said 1,479 BMW Z-4s are registered in King County -- of those about 283 are silver.

Hynds said that considering that information and the fact witnesses at the scene say the suspect was a well-dressed white or Asian male in his 20s or 30s with dark, slicked-back hair, it's only a matter of time until her prayers are answered.

"Please, God, speed the Seattle Police Department in finding the person that murdered our friend, Yancy."

Millman asked Seattle police why they are calling the case a possible road rage incident, whether they have any video of what happened and whether witnesses said the two drivers were speeding or being aggressive.

Police wouldn't elaborate and only said their detectives continue to investigate.