Three former employees of a now-closed California school were charged this week in the Nov. 2018 death of a 13-year-old student with autism. He died after being restrained while in the school’s care, prosecutors say.

While authorities did not initially evidence of “foul play or criminal charges,” at the conclusion of their investigation, the El Dorado County District Attorney announced charges of felony involuntary manslaughter for the school’s former principal Staranne Meyers, special education teacher Kimberly Wohlwend and executive director Cindy Keller in a statement on Tuesday.

Guiding Hands School, Inc., the California company that owned and operated the school, which served children with special needs, also face charges of felony involuntary manslaughter. Last December, after the incident, the California Department of Education “suspended the certification of Guiding Hands School, Inc.,” leading to the school’s permanent closure, authorities said.

Wohlwend and Keller did not immediately respond to TIME’s request for comment on Thursday. Attempts to reach Meyers were unsuccessful.

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