The man who was arrested and charged in the Nov. 14 killing of 9-year-old Oscar Fuentes has been found dead inside his cell in the D.C. Jail, according to a report from WTTG/FOX5. Josue Pena, 26, had been charged with first-degree murder in the death of Fuentes, who died after being shot through the door of his Columbia Heights apartment. The Washington Post reported earlier that paramedics had been called to the jail for a call of an unconscious inmate this afternoon. WTTG says Pena was found hanged inside his cell just after 1 p.m. He was pronounced dead later at Howard University Hospital, with the cause of death determined to be cardiac arrest by asphyxiation. The report also includes these details:

Pena told prosecutors he had a gun in his waist band, but it accidently went off as he walked up the stairs.

Court documents indicate police also found the murder weapon, a .22 caliber revolver at his uncle’s home on Kenyon Street NW. One tenant at the home with a 2-week-old baby says the suspect was there Saturday an hour after the shooting looking for a place to stay.

WTOP says Pena’s death is under investigation.