TUCSON, Ariz. — A former Fargo police chief has offered to resign as head of the Tucson Police Department following the death of a man in police custody.

Chris Magnus, who served as Fargo police chief from 1999 to 2006, offered to resign at a news conference Wednesday, June 24, after an investigation into the death of 27-year-old Carlos Ingram-Lopez.

The Pima County medical examiner listed sudden cardiac arrest, acute cocaine intoxication, physical restraint and an enlarged heart as contributing factors to Ingram-Lopez's death, according to the Arizona Daily Star. The medical examiner did not determine the ultimate cause of death.

According to Magnus, body camera footage of the incident was immediately shown to investigators but he did not view the footage right away. The footage was played at Wednesday's press conference, which showed a handcuffed Ingram-Lopez lying face down on the floor and covered in a blanket.

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Magnus accepted responsibility for failing to promptly view the footage and said the department implemented a policy that requires at least two chiefs to see footage from an in-custody death within 48 hours, the Arizona Daily Star reported.

"Although I believe neither was the result of any sort of malevolence or deliberate attempt to hide anything, I realize that given the times we're in, any mistakes of this kind are viewed with great suspicion and contribute to the lack of trust in the police," Magnus told reporters at the news conference.

The Tucson City Council and City Manager will need to approve Magnus's resignation before it is official.

Magnus was the police chief in Fargo before becoming chief in Richmond, Calif. He took the position in Tucson in January 2016.