Officers and medics responded to the scene, in the area of North 85th Street and 1st Avenue NW, shortly before 9 p.m. after receiving a 911 call from the victim.
When officers arrived, they found the man dead at the scene of a single gunshot wound, said Renee Witt of the Seattle police.
He was later identified as David L. Peterson, 54, who is the husband of Kimberly Peterson, a database coordinator for the King County Prosecutor's Office.
Peterson and his wife of 22 years had not lived in Seattle long. She told KOMO News that her husband left for his nightly walk and never came back. Kimberly Peterson said when she didn't hear from him she became concerned and checked the Seattle Police blotter.
It was there she saw a person matching his description had been killed near their house. A phone call soon confirmed that.
Police say Peterson was found in a car in the area of Bartell and Fred Meyer.
Witnesses saw three suspects running from the area after the shooting, Witt said.
The suspects are described as: a black man, 20 to 30 years old, 5-feet-10-inches tall, with a thin build and wearing a Northface jacket; a short black man; and a white woman.
Detectives would like to talk to anyone who may have come into contact with the suspects. Investigators believe the three may have been committing robberies in the area prior to the shooting incident.
Anyone with information about this incident or the suspects' whereabouts is asked to call the Seattle police tip line at 206-233-5000. Anonymous tips are welcome.
A homicide investigation continues as police search for the suspects.