Cousin arrested in murder case that led police to Amir Locke apartment

The teen was arrested on Monday in Winona, St Paul police said on Twitter. He was booked into the juvenile detention center on suspicion of second-degree murder in the 10 January killing of Otis Elder and was expected to be charged.

The death of Locke, who was Black, angered his family and activists, who questioned the initial police account of the shooting.

Hundreds turned out for a rally on Saturday in downtown Minneapolis and students in area high schools planned a walkout on Tuesday.

It has also prompted an immediate re-examination of no-knock arrest warrants, with the Minneapolis mayor, Jacob Frey, last week announcing a moratorium while the city brings in outside experts. Some lawmakers plan to push for a statewide ban.

The Minneapolis interim police chief, Amelia Huffman, has said her department had warrants that would have required authorities to knock and not knock. Huffman has said Locke was not named in the search warrants.

A Minneapolis Swat team entered the unit without knocking on 2 February. Body-camera video shows an officer using a key to unlock the door and enter, followed by at least four officers in uniform and protective vests, time-stamped at about 6.48am.

The video shows an officer kick a sectional sofa. Locke is seen wrapped in a blanket, holding a pistol. Three shots are heard and the video ends.

The city also included a still from the video showing Locke holding the gun, his trigger finger along the side of the barrel. Minneapolis police have said Locke was shot after he pointed his gun in the direction of officers.

Surveillance video allowed police to track the Mercedes, which was stolen, to the Bolero Flats apartment building where Locke was shot. The 17-year-old was identified by witnesses as living with his mother in Apartment 1402, and also having a key to 701, where his brother lives and where Locke was shot by police.

St Paul police said the warrants that led to the search will probably be unsealed after charges are filed.

Elder, a 38-year-old father of two, was found shot and lying in the street on 10 January. The St Paul Pioneer Press reported that paramedics gave him medical aid and took him to a hospital, where he was pronounced dead. A motive for his killing was not immediately known.