BOULDER, Colo. (AP) — Law enforcement officials and former associates of a 21-year-old man accused of
killing 10 people at a Colorado supermarket have described the suspect as prone to sudden rage — and
disclosed that he was suspended from high school several years ago for a sudden attack on a classmate
that left the student bloodied.
Ahmad Al Aliwi Alissa, from the Denver suburb of Arvada, was booked into jail Tuesday on murder charges a
day after the attack at a King Soopers grocery in Boulder and is scheduled to make his first court
appearance Thursday.
He will be advised at the hearing of the charges he faces and his rights as a defendant. He would not be
asked to enter a plea until later in the judicial process.
Alissa bought a Ruger AR-556 pistol — which is technically a pistol though it resembles an AR-15 rifle
with a slightly shorter stock — on March 16, six days before the attack, according to an arrest
affidavit. Investigators have not established a motive, said Boulder County District Attorney Michael
Dougherty.
Authorities have not disclosed where the gun was purchased. An AR-15-style gun was recovered inside the
supermarket and believed to have been used in the shooting, said a law enforcement official briefed on
the shooting who was not authorized to speak publicly and spoke to The Associated Press on condition of
anonymity.
A green tactical vest and a hand gun were also recovered inside the grocery store after the suspect
removed most of his clothing shortly before he was taken into custody.
Among the dead was Boulder police Officer Eric Talley, 51, who was the first to arrive after responding
to a call about shots fired and someone carrying a gun, said police Chief Maris Herold.
The law enforcement official who was briefed on the shooting said the suspect’s family told investigators
that Alissa had delusions and that they believed he was suffering some type of mental illness. The
relatives described times when Alissa told them people were following or chasing him, which they said
may have contributed to the violence, the official said.
After the shooting, detectives went to Alissa’s home and found his sister-in-law, who told them that he
had been playing with a weapon she thought looked like a "machine gun" about two days earlier,
according to an arrest affidavit.
No one answered the door Tuesday at the Arvada home believed to be owned by the suspect’s father. The
two-story house with a three-car garage sits in a relatively new middle- and upper-class neighborhood.

When he was a high school senior in 2018, Alissa was found guilty of assaulting a fellow student in class
after knocking him to the floor, climbing on top of him and punching him in the head several times,
according to a police affidavit.
Alissa "got up in classroom, walked over to the victim & ‘cold cocked’ him in the
head," the affidavit said.
Alissa complained that the student had made fun of him and called him "racial names" weeks
earlier, the affidavit said.
An Arvada police report said the victim was bloodied and vomiting after the assault. Alissa was suspended
from school and sentenced to probation and community service.
One of his former high school wrestling teammates, Angel Hernandez, said Alissa became enraged after
losing a match during practice, letting out a stream of invectives and yelling that he would kill
everyone. Alissa’s coach kicked him off the team because of the outburst, Hernandez said.
"He was one of those guys with a short fuse," Hernandez said. "Once he gets mad, it’s like
something takes over and it’s not him. There is no stopping him at that point."
Hernandez said Alissa also acted strangely at times, turning around suddenly or glancing over his
shoulder.
"He would say, ‘Did you see that? Did you see that?’" Hernandez recalled. "We wouldn’t see
anything. We always thought he was messing with us."
Arvada police investigated but dropped a separate criminal mischief complaint involving Alissa in 2018,
said Detective David Snelling. Alissa also was cited for speeding in February.
After dark Tuesday, about 100 people mourned at a makeshift memorial set up for those killed in the
supermarket nearby — adorning it with wreaths, candles, banners reading "#Boulderstrong" and
10 crosses with blue hearts and the victims’ names.
Four girls huddled in the cold, one crying as she reminisced about how they had protested the 2018
shooting at Marjory Stoneman Douglas High School in Parkland, Florida. Others recalled the 1999 massacre
at Columbine High School and the 2012 Aurora movie theater massacre.
Homer Talley, 74, described his son Eric as a devoted father who "knew the Lord." He had seven
children, ages 7 to 20.
The other dead were identified 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 Jodi
Waters, 65.
Leiker, Olds and Stong worked at the supermarket, former co-worker Jordan Sailas said.
Kim Cordova, president of the United Food and Commercial Workers Local 7, which represents more than 30
store employees, said workers did their best to get customers to safety.
"They grabbed everybody they could and they brought them to the backroom or to other areas of the
store to hide or got them out through the back dock," Cordova said. "And these poor grocery
workers have just been through hell in general working through COVID this entire last year of the
pandemic."
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
AP, 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.
In Washington, President Joe Biden called on Congress to tighten the nation’s gun laws. Senate Majority
Leader Chuck Schumer vowed to bring forward two House-passed bills to require expanded background checks
for gun buyers. Biden supports the measures, but they face a tougher route to passage in a closely
divided Senate with a slim Democratic majority.
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Associated Press writers Michael Balsamo in Washington, Jim Anderson in Denver and AP staff members from
around the U.S. contributed to this report. Nieberg is a corps member for the Associated Press/Report
for America Statehouse News Initiative. Report for America is a nonprofit national service program that
places journalists in local newsrooms to report on undercovered issues.