Shooter’s friend: It came out of nowhere

(CNN) – A popular freshman shocked friends, fellow students, and teachers when he opened fire at Marysville-Pilchuck High School. The gunman shot five people, killing one, before killing himself, law enforcement officials say.

"It just came out of nowhere. I honestly wouldn't expect it," student Frankie Pina, a friend of the shooter, told CNN.

"We used to be very good friends. We kind of drifted away a little bit. And now this happened," the junior said.

The gunman, whom witnesses identify as Jaylen Fryberg, was not a violent person, said Pina. Fryberg's girlfriend had broken up with him, and his tweets had recently taken a dark turn, he said.

He sent "scary" tweets "about hurting himself and stuff like that," said Pina.