VERNON, Texas (CBSDFW.COM) — The teenager accused of fatally shooting multiple people at Santa Fe High School last year has been moved to a North Texas mental health hospital after a judge ruled that he is mentally unfit to stand trial.

Santa Fe High School (DANIEL KRAMER/AFP/Getty Images)

Dimitrios Pagourtzis arrived at the North Texas State Hospital in Vernon from the Galveston County Jail on Thursday.

Around 8 a.m. May 18, 2018, Pagourtzis opened fire at the high school — killing ten and injuring over a dozen more. He was shortly arrested and charged with multiple counts of capital murder and attempted murder.

Dimitrios Pagourtzis (Credit: Galveston County Jail)

Attorney Katy-Marie Lyles said she’s happy he was admitted to the hospital so quickly, as there is a waiting list for such facilities.

Pagourtzis’s Feb. 18 trial is on hold because of his treatment at the hospital.

(© Copyright 2019 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)