(USA TODAY) -- Jared Michael Padgett arrived at his Oregon high school on the school bus, just like any other day. But no one knew as they saw the freshman toting his guitar case and a duffel bag that he was armed for a bloodbath.
Inside the case and bag was an AR 15-type rifle, a semi-automatic handgun, nine loaded magazines capable of carrying hundreds of rounds and a large knife. He wore a vest used to carry bullets and other items and a sporting helmet in a camouflage design.
VIDEO: Oregon shooter armed for a bloodbath
"He entered the school through the boys locker room," Troutdale chief of police Scott Anderson said Wednesday during a press conference. The chief revealed more details about the shooting at Reynolds High School in the Portland suburb of Troutdale that left a student and the gunman dead and injured a teacher.
Anderson said Padgett arrived about 8 a.m. at the start of the school day and stalked the locker room for some time before he fatally shot Emilio Hoffman, 14, another freshman and rising soccer player.
Anderson said there was no connection between Padgett, 15, and Hoffman.
Physical education teacher Todd Rispler, a former track coach and football star at the school, heard a commotion and confronted Padgett, who shot him once in the hip.
Rispler dragged himself to the main office where he notified the administration and initiated lockdown procedures, Anderson said.
Padgett ran off down the main hallway of the school. Almost immediately, Padgett saw officers begin to stream in to the school as he walked the hallway and exchanged gunfire with the officers. He ran into a school restroom where he shot himself in a bathroom stall, Anderson said.
The police chief did not provide details about Padgett and he would not release a motive for the shooting. "It's too early," for that, he said.
Padgett got the guns, ammunition and knife from his home. Anderson said the weapons were all secured, but Padgett found a way around the security. Anderson did not detail how.
"I cannot emphasize enough the role that Mr. Rispler and the responding officers played in saving many, many lives yesterday," Anderson said. "Given the weapons and amount of ammunition that the shooter was carrying, the early notification and the initial law enforcement response were critical."
Reynolds is the state's second-largest high school with 2,800 students.
The shooting was the 74th on a U.S. campus since the December 2012 massacre at Sandy Hook Elementary School in Newtown, Conn., according to the American Federation of Teachers, the union representing staff at Reynolds High.