BOULDER, Colo. — Police on Tuesday identified a 21-year-old man as the suspect who opened fire inside a crowded Colorado supermarket in an attack that killed 10 people, including an officer, and sent terrorized shoppers and employees scrambling for cover.
Authorities said Ahmad Al Aliwi Alissa was from the Denver suburb of Arvada and that he engaged in a shootout with police inside the Boulder store. The suspect was being treated at a hospital and was expected to be booked into the county jail later in the day.
Investigators have not established a motive, but authorities believe he was the only shooter, Boulder County District Attorney Michael Dougherty said.
A law enforcement official briefed on the shooting told The Associated Press that the gunman used an AR-15 rifle, a lightweight semi-automatic rifle. Officials were trying to trace the gun. The official was not authorized to speak publicly and spoke to AP on the condition of anonymity.
Officials also identified the nine other victims after previously naming the officer. The dead ranged in age from 20 to 65.
Hundreds of police officers from throughout the Denver area responded to the attack, converging on a King Soopers supermarket in a busy shopping plaza in southern Boulder.
SWAT officers carrying ballistic shields slowly approached the store as others escorted frightened people away from the building, which had some of its windows shattered. Customers and employees fled through a back loading dock to safety. Others took refuge in nearby shops.
Officers had escorted a shirtless man in handcuffs, blood running down his leg, from the store during the siege. Authorities would not say if he was the suspect.
“This is a tragedy and a nightmare for Boulder County,” Dougherty said. “These were people going about their day, doing their shopping. I promise the victims and the people of the state of Colorado that we will secure justice.”
Boulder Police Chief Maris Herold identified the slain officer as Eric Talley, 51, who had been with the force since 2010. He was the first to arrive after responding to a call about shots fired and someone carrying a rifle, she said.
“He was by all accounts one of the outstanding officers of the Boulder Police Department, and his life was cut too short,” Dougherty said.
Dozens of police and emergency vehicles, their lights flashing, escorted an ambulance carrying the slain officer from the shooting scene after nightfall. Some residents stood along the route, their arms raised in salute.
The attack in Boulder, about 25 miles northwest of Denver and home to the University of Colorado, stunned a state that has seen several mass shootings, including the 1999 Columbine High School massacre and the 2012 Aurora movie theater shooting.
Monday’s attack was the seventh mass killing this year in the U.S., following the March 16 shooting that left eight people dead at three Atlanta-area massage businesses, according to a database compiled by The Associated Press, USA Today and Northeastern University.
It follows a lull in mass killings during the coronavirus pandemic in 2020, which had the smallest number of such attacks in eight years, according to the database, which tracks mass killings defined as four or more dead, not including the shooter.
Rep. Joe Neguse, a Democrat whose district includes Boulder, said Tuesday on “CBS This Morning” that “enough is enough” when it comes to political impasses that keep gun control laws from passing Congress.
“The time for inaction is over. It does not have to be this way. There are commonsense gun legislation reform proposals that have been debated in Congress for far too long,” Neguse said. “The gun lobby and so many others have stopped the ability to make meaningful reforms in the past, but that’s no excuse. I think the American people are tired of excuses.”
Speaker Nancy Pelosi said the U.S. House stands with gun violence victims who say “enough is enough.”
“Action is needed now to prevent this scourge from continuing to ravage our communities,” she said in a statement Tuesday in which she cited House passage of two background checks bills. Those bills are now pending before the Senate.
“While we await further information on the details of this heinous crime, we continue to stand with victims, families and young people across the country saying, ‘Enough is enough.’”
Sarah Moonshadow and her son, Nicolas Edwards, had just bought strawberries inside the supermarket when they heard gunfire. Moonshadow told The Denver Post they ducked and “just ran.” Outside, Edwards said, arriving police pulled up next to a body in the parking lot.
“I knew we couldn’t do anything for the guy,” he said. “We had to go.”
Video posted on YouTube showed one person on the floor inside the store and two more outside on the ground. What sounds like two gunshots are heard at the beginning of the video.
Investigators had just started sorting through the crime scene and conducting witness interviews, Dougherty said.
Matthew Kirsch, the acting U.S. attorney for Colorado, pledged that “the full weight of federal law enforcement” would support the investigation. He said investigators from the Bureau of Alcohol, Tobacco, Firearms and Explosives were at the crime scene, along with FBI agents.
White House press secretary Jen Psaki tweeted that President Joe Biden had been briefed on the shooting.
Colorado Gov. Jared Polis said in a statement that the state had seen “the face of evil. I am grieving with my community and all Coloradans.”
The King Soopers chain said in a statement that it was offering prayers and support “to our associates, customers, and the first responders who so bravely responded to this tragic situation.”