• Aaron Ybarra charged with first-degree murder and assault • One student killed and two others injured in school shooting

This article is more than 6 years old

This article is more than 6 years old

The gunman who killed one student and wounded two others at a small Seattle college last week had stopped taking his medications because he "wanted to feel the hate", and he detailed his plans in a handwritten journal for two weeks before the attack, a prosecutor said on Tuesday.

"I just want people to die, and I'm gonna die with them!" Aaron Ybarra wrote the day of the shooting, King County prosecutor Dan Satterberg said.

Satterberg released new details of the allegations as he filed charges of first-degree murder, attempted murder and assault against Ybarra, 26. Satterberg is seeking an exceptional sentence of life in prison.

Authorities say Ybarra has been held on suicide watch without bail at the county jail since a student pepper-sprayed the gunman and ended the rampage Thursday at Seattle Pacific University.

Ybarra's lawyer, Ramona Brandes, has said her client has a long history of mental issues but is aware of the trauma caused by the shooting and is sorry. She did not immediately return a message seeking comment Tuesday.

The journal, recovered by police from Ybarra's truck, parked near the shooting, reflects Ybarra's admiration for the school shooters at Virginia Tech and Columbine high school but does not clearly explain why he targeted the Seattle college, Satterberg said.

Ybarra considered other universities – Washington State, Eastern Washington and Central Washington were mentioned – but apparently dismissed them because they were too far away, the prosecutor said.

Instead, weeks before the shooting, Ybarra took a tour of Seattle Pacific, a private Christian college in a leafy neighborhood north of downtown. He remarked on how friendly and helpful the academic counselor and students were who showed him around, Satterberg said.

During the tour, Ybarra learned the academic year would soon end, solidifying his plans, Satterberg said.

Ybarra shot Paul Lee, 19, in the back of the head with a double-barreled shotgun outside Otto Miller Hall after Lee turned to run away, according to the charging documents. Some of the birdshot pellets struck another student, Thomas Fowler, standing several feet away.

He tried to shoot a woman nearby, but the gun misfired and she escaped, a detective's probable cause statement said.

Ybarra then entered the building, encountering a man seated at a table, the statement said. Ybarra ordered the man not to disrespect him, but did not shoot, the detective wrote – instead turning the gun on student Sarah Williams, who was coming down some stairs.

Williams was wounded and remains hospitalized in satisfactory condition.

Because one of the barrels of the gun had misfired, Ybarra essentially had a single-shot weapon, Satterberg said.

As Ybarra tried to reload, Jon Meis, a student building monitor, rushed out of his office, pepper-sprayed the gunman, grabbed the weapon and hid it in his office, the prosecutor said. Meis came back and helped another student hold the gunman down until police arrived.

Ybarra fired just two shots but carried nearly 50 shells and had 25 more in his truck, because he planned to kill many more people, Satterberg said. He also had a large hunting knife and planned to slit his own throat, the detective's statement said.

"In the defendant's plan to murder innocent students, he did not anticipate the courage of Jon Meis," Satterberg said. "Mr Meis, though a reluctant and humble figure in this tragedy, undoubtedly saved many lives. He emerges from this awful crime as an example of how we all would hope we would act to confront a killer."

Ybarra gave an hourlong police interview after his arrest, saying he didn't specifically target any of the students but had a "hatred for the world in general," the probable cause statement said. He told detectives he had been diagnosed with obsessive-compulsive disorder and transient psychosis but had stopped taking his medicine about six months earlier because he wanted to feel his hate, it said.

The standard sentencing range for the charges is 69 to 86 years in prison, but Satterberg said he is seeking an exceptional sentence under a rarely used aggravating factor: that the crime had a "destructive and foreseeable impact on persons other than the victim."