A teenager who a D.C. prosecutor said was part of a group responsible for a string of armed robberies in Southeast Washington was arrested Wednesday in the shooting death of a man early this month.

D.C. Superior Court Magistrate Judge Karen A. Howze ordered Daquan Tinker, 16, of Southeast Washington to be held until his next hearing, Sept. 14. He was charged as an adult with second-degree murder while armed in the killing of Terrence Robinson, 48, also of Southeast.

Tinker’s attorney, Michael Satin of the District’s Public Defender Service, argued at the arraignment that only one witness, who had been robbed shortly before the shooting, linked his client to the killing.

Satin also said that the witness misidentified Tinker in a photo lineup and had told police that the killer was 5 feet 6 and in his early 20s. Tinker is 6-1.

But Assistant U.S. Attorney Emily Miller said Tinker had the witness’s Metro card taken in the robbery.

Robinson was shot about 5:20 a.m. in the 2600 block of Douglas Road SE. Police said officers found him on an elevated landing of a parking lot with a trail of blood leading to the street.

About the same time, police said they received a report of an armed robbery in the same block. A man told police that he was accosted by five men, one wearing a mask who put a silver-
colored revolver to his head.

Police said the robbers took the victim’s backpack, debit card, keys, wallet and Metro SmarTrip card. The victim told police that the robbers were angry because he had no money. According to court documents, the gunman said, “Do you want your brains?”

The witness told police that one robber, whom he later identified as Tinker, broke away and approached Robinson. He told police that he saw Robinson run and then heard up to four gunshots, the court documents said.

Tinker and an acquaintance were arrested last week in connection with another robbery, police said. Tinker was released from custody, according to court documents.

The next day, police said that they searched the acquaintance’s home and found Tinker with several Metro SmarTrip cards, cellphones and iPods.