Mayor Vincent C. Gray began his first day as the leader if the nation's capital by working at home and arriving at the John A. Wilson Building at 2 p.m. Monday.
He said one of his most immediate concerns was to visit families of those killed in Sunday's shootings.
"This is obviously not the kind of start to the year we would like," he told reporters after getting out of his vehicle.
Gray (D) said he believed a mother of one victim may have worked for him when he was director of the Department of Human Services. He said his calls have been going straight to voice-mail.
He said he is trying to coordinate visits through Police Chief Cathy L. Lanier.
He then gave the media a tour of the mayoral suite, which was abandoned by former Mayor Adrian M. Fenty (D) in favor of a bullpen.
Gray said he would have "offices."
The mayor also said he would make more announcements of nominees to his Cabinet this week.
Gray told reporters that he would reinstate the news conferences that former mayor Anthony Williams used to hold. Fenty preferred that reporters catch him at ribbon-cuttings and other news events.
Gray said reporters would be free to ask him any questions at what might be a bi-weekly news conference in a press room in the Wilson Building.