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A Stockton high school was locked down Monday after a “trespasser” stabbed and killed a student, police said.

Family identified the victim as 15-year-old Aliycia Reynaga, describing her as a star in the making, a great kid with positive attitude and as someone who loved the outdoors, KTLA sister station KTXL reported.

“All of our softball girls are taking it pretty hard,” said Leia Madrazo, varsity softball coach.

Her family said she was always active, and that besides softball, she was also involved in mixed martial arts. 

The community was shocked someone was able to get on campus.

“A lot of us can’t get over the fact that someone came onto campus and did such a crime,” Madrazo said.

Reynaga was killed on campus after police said a trespasser entered Stagg High School campus and stabbed her multiple times. Police said they believe the attack was random, and they are trying to find out why she was targeted. 

Stockton police identified the suspect as 52-year-old Anthony Gray.

He was arrested on suspicion of murder and booked into the San Joaquin County Jail.

Gray is being held without bail and is expected to appear in court Wednesday.