The suspect in the Colorado supermarket shooting that claimed 10 lives now faces a total of 54 charges, the Boulder County district attorney said Thursday.
And more charges could follow.
Ahmad Al Aliwi Alissa was already charged with 10 counts of murder and one count of attempted murder for the March 22 mass shooting at a King Soopers grocery in Boulder.
District Attorney Michael Dougherty filed 43 more charges against Alissa, including 32 additional counts of attempted murder, one count of first-degree assault and 10 counts of unlawful possession of a large-capacity magazine during the commission of a crime, according to an amended criminal complaint filed Wednesday.
About 115 people were inside the store and at least 25 were in the parking lot when the attack happened, Dougherty said. He said more charges are possible.
The victims included employees, customers and Boulder Police officer Eric Talley, a father of seven who was gunned down seconds after he rushed into the store, Dougherty said.
"All victims were shot and killed before Officer Talley and others entered King Soopers," Dougherty said.
Talley was part of the first police entry team, along with officers Pam Gignac and Bryan Capobianco.
Capobianco is the victim of attempted murder in multiple counts because he rushed into the store a second time, Dougherty said.
"That first entry by Officer Talley, Officer Capobianco and Officer Gignac, they charged in," the district attorney said.
"And less than 30 seconds after Officer Talley was tragically shot and killed, a second wave of officers -- including again, Officer Capobianco -- charged back into the King Soopers."
A month after the massacre, the motive remains unclear.
"At this point we don't have information about a specific motive," Dougherty said.
He said Alissa's next court appearance is set for May 25.
The Boulder massacre is one of at least 50 mass shootings that have happened in the United States since March 16, when eight people were killed and one person was wounded in the Atlanta-area spa shootings.
Colorado has been devastated by mass shootings. Monday, Gov. Jared Polis signed two bills tightening gun regulations into law.
"While of course this legislation can't bring any of our fellow Coloradoans back who are no longer with us, we know that this not only can prevent future loss of life, but can also be part of the healing," Polis said.
CNN's Leslie Perrot and Stella Chan contributed to this report.