A murder suspect and MS-13 gang member who entered the United States illegally enrolled at a Maryland high school. Police failed to tell school administrators of his background as reported on Monday, Sept. 9, by Baltimore’s Fox 45.

The revelations have sparked outrage by the murder victim’s mother over the potential danger it posed to students at the school he attended.

Walter Martinez, who was 16 at the time, became the primary suspect in the murder of Kayla Hamilton in 2022. Authorities said that surveillance video and an audio recording placed Martinez at the scene of the crime, and they already read him his Miranda Rights. All they needed to arrest him were DNA results.

“They knew he was guilty,” Tammy Nobles, Hamilton’s mother, told Baltimore’s Fox 45. “They just needed that DNA.”