PHOENIX (AP) — The Tucson, Arizona, police chief on Wednesday offered his resignation after the death of a 27-year-old man who died while handcuffed and placed face-down, resulting in the resignation of three officers the chief said had violated department policy.

Chief Chris Magnus offered his resignation during a news conference a day after the death of Carlos Ingram-Lopez on April 21 became public, acknowledging the department had failed to disclose the death in a timely manner.

Mayor Regina Romero said she was surprised by Magnus’ resignation offer and needed to think about it, adding that he has been “an honest and great” police chief.

Magnus, who was appointed chief in 2016, said three of the officers who responded “committed multiple policy violations and failed to handle the incident consistent with their training.”

The criminal investigation into Ingram-Lopez’s death was sent to the county attorney’s office, which has yet to determine whether it will file criminal charges against the officers.