The Boulder police chief said on Tuesday that a 21-year-old man from a Denver suburb had been charged with 10 counts of murder in the shooting on Monday at a grocery store in Boulder, Colo., that left 10 people dead.
The rampage paralyzed parts of Boulder, with law enforcement officers in tactical gear swarming a busy shopping center and at least one other location.
Here is what we know about the rampage.
Around 2:30 p.m., the aisles of a King Soopers grocery store a few miles south of the campus of the University of Colorado became a scene of terror when a gunman began shooting using an assault-style rifle, law enforcement officials said. Shoppers and employees ran for cover, and some said they had escaped through an employee stock area and a loading dock at the back of the store.
Ryan Borowski, a licensed massage therapist who lives on the other side of Boulder, said in an interview that he had stopped to buy a soda, chips and possibly ice cream at the supermarket when the shooting began.
“I just second-thought it and said, ‘No, I don’t need ice cream,’” he said. “That’s when I heard the gunshots.”
About six hours after the shooting, the Boulder police chief, Maris Herold, announced that 10 people had been killed, including a police officer.
“These were people going about their day, doing their food shopping, and their lives were cut abruptly and tragically short by the shooter, who is now in custody,” Michael Dougherty, the Boulder County district attorney, said at a news conference on Monday night.
Ten people were killed.
Chief Herold said on Tuesday that the coroner’s office had identified all the victims and notified their families before 4 a.m.
One of them was Eric Talley, 51, who joined the Boulder Police Department in 2010. He was the first officer to respond to the scene, according to Chief Herold, who credited him, along with officers from across the region, with preventing more people from being killed.
The authorities identified the nine additional victims as Denny Stong, 20; Neven Stanisic, 23; Rikki Olds, 25; Tralona Bartkowiak, 49; Suzanne Fountain, 59; Teri Leiker, 51; Kevin Mahoney, 61; Lynn Murray, 62; and Jody Waters, 65.
Who is the suspect and how was he caught?
Chief Herold identified the suspect as Ahmad Al Aliwi Alissa of Arvada, a suburb of Denver about 20 miles from Boulder.
Mr. Dougherty, the district attorney, said he had “lived most of his life in the United States.” Officials said they had two encounters in 2018 with Mr. Alissa — one on a report of third-degree assault, a misdemeanor, and one of criminal mischief. Law enforcement officials said he was known to the F.B.I. because he had ties to someone the bureau was investigating.
Chief Herold said Mr. Alissa had been taken into custody with a leg injury but was in stable condition and was expected to be taken to jail later on Tuesday.
Videos showed a handcuffed man being escorted from the building by officers, shirtless and with his right leg appearing to be covered in blood. The nature of his injuries was not immediately clear.
Elected officials weighed in.
President Biden has been briefed on the shooting and will be kept apprised of any further developments, the White House press secretary, Jen Psaki, said on Twitter.
At a news conference on Tuesday morning, Gov. Jared Polis of Colorado said his heart ached after the shooting, adding, “The eyes of the nation are on Colorado.”
Representative Lauren Boebert, Republican of Colorado, who made supporting gun owners’ rights a key part of her agenda, said she was praying for “the police, first responders, and those affected by this tragedy.”
Representative Joe Neguse of Colorado said mass shootings could not be the “new normal.”
“In this year of separation due to Covid, of loss and of loneliness, grocery stores like King Soopers have been one of our consistent gathering places, one of the few routine activities that we’ve continued to engage in as Coloradans and as Americans,” Mr. Neguse said. “It’s hard to describe what it means for this safe place to see a horrible tragedy like this unfold.”
Reporting was contributed by Bryan Pietsch, Will Wright, Erik Vance, Shawn Hubler, Neil Vigdor, Azi Paybarah, Nicholas Bogel-Burroughs, Jenny Gross, Richard Pérez-Peña, Stephanie Saul, Allyson Waller and Adam Goldman.