The knock on the door came at about 1:15 a.m. Friday.
Chris L. Jones glanced through the peephole of his door at Ashley Lane Apartments, 2250 S. Oliver, and then opened it.
That's when the man in the gray hooded sweatshirt opened fire.
Jones, 55, was hit "multiple times" and was pronounced dead at 1:49 a.m. Friday at Wesley Medical Center, Wichita police Lt. Ken Landwehr said.
No words were exchanged between Jones and his killer, Landwehr said, and there's no indication Jones knew him.
"We believe that he was targeting Mr. Jones, but for what motive we do not know," Landwehr said.
Jones had a criminal history, including pleading guilty to a drug-related crime last year, court records show. But Landwehr said he did not know what role, if any, it may have played in the shooting.
Two women in the apartment at the time of the shooting, Jones' 53-year-old ex-wife and a 29-year-old acquaintance, were not harmed.
Only Jones' ex-wife got a look at the suspect, Landwehr said, because the other woman was in another room.
The shooter left on foot, Landwehr said, but may have driven off in a vehicle parked nearby.
This is the fifth homicide of the year, police said. Anyone with information about the shooting should call the Police Department's homicide section at 316-268-4181 or Crime Stoppers at 316-267-2111.
Tips can also be sent by calling 800-222-TIPS (8477); by text message via CRIMES (274637) and beginning the message with TIP217; or on the Web at www.wsccs.com.