Officer William Evans, an 18-year Capitol Police veteran and father of two children, died in a hospital on Friday. He was 41. On Tuesday, he will become the second Capitol Police officer killed in the line of duty this year to lie in honor in the U.S. Capitol Rotunda. Following a congressional tribute, fellow officers and members of Congress may view his open casket during the afternoon.

The shooter drove 10 minutes to Fort Detrick after shooting and critically wounding two U.S. Navy sailors at Riverside Tech Park in Frederick, Md., on Tuesday. Emergency medical services airlifted the two wounded people to a hospital. Frederick police warned the base about the active shooter, and personnel shot and killed him when he breached a gate. Fort Detrick houses the military’s flagship biological defense laboratory and several federal civilian biodefense labs.

A U.S. Capitol Police officer has died after a driver crashed into a barricade on Constitution Avenue in Washington on Friday. Police shot and killed the driver, who exited his vehicle brandishing a knife and ran at two officers after crashing into them. The incident occurred near the Senate entrance to the Capitol. The building went on lockdown just after 1 p.m. Congress is in recess, and President Joe Biden left the White House earlier on Friday for Camp David.

Police identified the suspect accused of shooting and killing four people at an office complex south of Los Angeles on Wednesday as 44-year-old Aminadab Gonzalez. Orange Police Lt. Jennifer Amat told reporters on Thursday that this was not a random act of violence and seemed “to be related to a business and personal relationship which existed between the suspect and all of the victims.”

Four people, including a child, died when a shooter opened fire on an office building in Orange, Calif., Wednesday evening. One other person sustained injuries before police shot the suspect. Orange Police Department Lt. Jen Amat said officers transported the shooter to a local hospital in critical condition.

The Federal Bureau of Investigation is looking into accused mass shooter Ahmad Al Aliwi Alissa’s background, but investigators have not yet reported a motive, authorities in Boulder, Colo., said on Friday. John Mark Eagleton, who owns Eagles Nest Armory in Arvada, said Alissa passed a background check before purchasing the Ruger AR-556 pistol he allegedly used in Monday’s attack at a King Soopers grocery store that left 10 people dead.

Ahmad Al Aliwi Alissa’s defense attorney immediately asked for a mental health assessment of her client in court on Thursday. Authorities have charged him with 10 counts of first-degree murder and one count of attempted first-degree murder in the shooting deaths of 10 people at King Soopers grocery store on Monday in Boulder, Colo. Alissa, 21, entered in a wheelchair, presumably due to the gunshot wound in his leg, and said almost nothing during the hearing. His family told police that Alissa suffered delusions, often thinking people were following him.