Orlando Harris’ family asked Missouri police to confiscate the 19-year-old’s bulletproof vest, ammunition and AR-15-style rifle. They knew his mental health was fragile after more than one suicide attempt. But the best officers could do in a state with some of the most expansive gun rights is suggest Harris keep the gun in a storage facility.

Nine days later, Harris entered his former high school in St. Louis and declared, “You will all die.”

A new 456-page police report details efforts by Harris’ family to try to take the gun from him in the days before he entered the Central High School for Visual and Performing Arts on October 24, 2022, when he killed a student and a teacher. and injured seven others before being shot dead by police.

Missouri is not among the 21 states with a red flag law, which restricts the purchase of guns or temporarily removes them from people who may injure themselves or someone else.

The report shows that the first time Harris tried to kill himself was in the fall of 2021, just before he was scheduled to leave for college. The pandemic disruption, a friend’s murder arrest and a car wreck may have contributed to his depression, his family and former boss told investigators.

The police report does not mention that he attended college. Instead, he worked in the cafeteria at a senior living facility, where he sometimes discussed guns with co-workers.

The following year, Harris began a countdown to the shooting. His plans included detailed school maps and a plan to target teachers, students and the LGBTQ community. He also had plans to burn down his family’s home with them inside.

On October 8, 2022, he attempted to purchase a firearm from a licensed dealer in St. Charles, Mo., but the transaction was blocked by an FBI background check. The report does not explain why.

On October 10, Harris drove to a nearby suburb to pay a man $580 in cash for the rifle used in the shooting.

Harris’ family became more concerned on October 15 when two packages arrived from arms and ammunition suppliers. One of his sisters, Noneeka Harris, opened them, finding a body armor, magazine holsters and magazines. He then searched his bedroom and found the rifle.

Harris’ mother, Tanya Ward, called BJC Mental Health Services. Staff advised her to take the items to the police department.

The police told him they could not take the firearm because Harris was of legal age to possess it. They said they should go home and an officer would meet them there. When he returned, Harris was home and insisted on keeping the gun.

His mother was adamant that the gun not be in the house, so officers suggested a storage unit. The report said officers also advised her on the steps she needed to take to have her son considered mentally unstable. Federal law has barred mentally ill people from buying guns since 1968.

Eventually, the firearm and other items were loaded into the trunk of Harris’ sister’s vehicle, including a box of ammunition that arrived the next day. He later drove his brother to a warehouse, which was about 5 miles from the high school.

She told police she “knew something was going to happen.”

On October 24, shots rang out as Harris entered his former high school.