No suspect or suspects have been named in the 16-day-old murder of Dorothy and Edward Hoenshell as of Tuesday.
The elderly couple were found shot to death in their Fourth Street home April 9.
Brookings Police Chief Chris Wallace said Tuesday the investigation was stagnant right now.
Were waiting for crime lab information to come back. That should tell us something, he said.
Meanwhile, he said, Were still working on it. Were following up leads and interviewing people.
The Del Norte County District Attorneys office, which is assisting in the investigation, recently issued subpoenas for four witnesses in Crescent City wanted for questioning in connection with the case.
Three of the witnesses answered the subpoenas Friday and appeared at the Del Norte County courthouse, said Del Norte County District Attorney Bob Drossel.
The fourth witness served with a subpoena, Donald Webb Jr., Crescent City, was arrested on Saturday on a warrant charging failure to appear, along with unrelated charges, Drossel said.
It appears the investigation is focusing on Crescent City because that is where the Hoenshells car was found, as well as their grandson, Gregory Arthur Hoenshell, who was later arrested.
Gregory Hoenshell was taken into custody there on five outstanding Del Norte County warrants.
So far, he is only being considered a person of interest in the case. Curry County District Attorney Charlie Steak did not return The Pilots phone calls on Friday.