Officers responding to reports of multiple gunshots heard by neighbors in the 200 block of Woodrow Avenue found Dunn shot to death in a residential garage, police said.
Nearby residents told police a man fled the scene and hopped in a black van shortly after the shots were fired.
Based off a witness's rendition of the person of interest, police describe the subject as a black man approximately 30 to 40 years old, 5 feet 9 inches to 6 feet tall and weighing between 190 and 200 pounds.
Police caution not to confront the man if he is sighted, but to contact police and to note the license plate if a similar van is noticed.
The man may be traveling in the black, full-size van he reportedly used to flee the scene. That van is American in make with a tan or light-colored horizontal stripe around the body and has a very loud exhaust, according to witness reports to police.
Anyone with information is asked to contact detectives with police investigations at (707) 651-7646 or (800) 488-9383.
