Detectives, with the assistance of SWAT officers, executed a search warrant at his residence earlier Tuesday, however, Knight was not at home.
Two other men, Charles Ringgold, 20, of the unit block of Bradley Drive in Newark and Tavaughn Crosell, 17, of the unit block of Fairway Road in Newark have already been charged with first degree murder in Steed's death.
Police say Steed was killed in an apparent random act of violence on Tuesday, July 28th at the Georgetown Village Apartment Complex shortly after 10:00 p.m.
Police say Steed was walking from his parents' home in Carriage Run to a friend's home nearby when he was approached by three men wearing black.
Those men robbed and shot Steed, who made it to a hallway but died at the hospital.
Police believe Steed happened to be in the wrong place at the wrong time.
Authorities say the three possible suspects were patrons at a 7-11 store just prior to the robbery and shooting. Detectives were able to recover the surveillance video from the business, as other investigators continued to interview witnesses.
Anyone with information about this crime, or Knight's whereabouts, is asked to call police at (302) 395-8110.