Three instructors and their supervisor from the Massachusetts State Police Academy's Defensive Tactics Unit will face manslaughter charges in connection with the September 2024 death of recruit Enrique Delgado-Garcia.

David Meier, the attorney tapped by Attorney General Andrea Campbell to "independently and impartially" examine the case, announced Monday that a special statewide grand jury had returned indictments against the four Massachusetts State Police officials: Sgt. Jennifer Penton, Trooper Edwin Rodriguez, Trooper David Montanez and Trooper Casey LaMonte. He said evidence presented to the grand jury supports charges of involuntary manslaughter and causing serious bodily injury to a person participating in a training program against all four. Penton will also face a perjury charge for allegedly lying to investigators, he said.

Delgado-Garcia, 25, of Worcester, died Sept. 13, 2024, following a training exercise in a boxing ring at the State Police Academy in New Braintree.

"Enrique should be alive today," Campbell said at a press conference Monday. She added, "I am grateful to attorney Meier for his thorough efforts to follow the facts and to seek accountability to those responsible for Enrique's death. In no way is this investigation and the charges it has yielded a condemnation of all law enforcement."

Meier said the four indicted members of the academy staff "committed a series of wanton and reckless acts in connection with various defensive tactics and physical confrontation training exercises conducted at the academy" in the days and weeks before Delgado-Garcia's death.

Those acts "resulted in Enrique Delgado-Garcia suffering concussion-like symptoms as the result of unauthorized, unapproved and unsupervised boxing-related sparring exercises that occurred during academy training activities" on Sept. 11, 2024, and "culminated in Enrique Delgado-Garcia suffering multiple blunt force injuries to the head and massive brain bleeding as the result of the failure of academy staff to intervene and bring a stop to a competitive boxing match between Mr. Delgado-Garcia and a fellow trainee that occurred during academy training activities the following morning, on Thursday, September 12, 2024."

Asked about any potential consequences for the other trainee involved in the Sept. 12, 2024, boxing match, Campbell said, "Not in this investigation."

Delgado-Garcia's death — and subsequent reports about alleged hazing and intense conditions at the training academy — prompted renewed scrutiny of the Mass. State Police, which has been rocked by a series of controversies in recent years.

Meier said that various members of the academy's command staff "had the authority and the ability to address many of the circumstances surrounding Enrique Delgado-Garcia’s death" but that the evidence presented to the grand jury showed their personal knowledge, involvement and participation "were insufficient to support criminal charges."

In response to a reporter's question, Campbell suggested Monday that more information could be made public on the non-criminal findings of Meier's probe.

"So it's an ongoing investigation, and as it unfolds, attorney Meier and — where appropriate, either together or separately — we'll continue to update the public on what can be shared," she said. "It's obviously an ongoing investigation, so we have to be extremely careful."

State Police Superintendent Col. Geoffrey Noble, who was appointed by Gov. Maura Healey to take over atop the department weeks after Delgado-Garcia's death, called Monday "a difficult and somber day for the Massachusetts State Police" and said the department cooperated fully with Meier's investigation. In the wake of Delgado-Garcia's death, State Police suspended boxing as part of the training academy's defensive tactics curriculum.

"In the period since the tragedy, the Department has taken several steps to strengthen training at the Academy, including commissioning an independent review by the International Association of Chiefs of Police, and expanding support for recruits. As the IACP review nears completion, our work continues with focus and resolve, guided by Enrique’s memory, and committed to the highest standards of professionalism, leadership, and training," Noble said in a statement. "We will remain engaged with the legal process and will reserve further comment at this time to protect its integrity."