Officials charged a 10-year-old Missouri boy with murder after he allegedly shot a 7-month-old baby in the head execution-style June 26, according to a report.

St. Louis Metropolitan Police Department (SLMPD) officers responded to the incident just after 4:00 p.m. and found the baby, identified as 7-month-old Kiyomi Parker, within the residence, according to an SLMPD press release. The baby died from her wounds. Homicide Detectives and Child Abuse Detectives later opened an investigation into the incident and learned that an unidentified 10-year-old boy shot the child, the SLMPD alleged. Witnesses said the 10-year-old retrieved a gun and shot the infant, according to court documents cited by First Alert 4. The boy confessed that he shot baby in the head, WTHR13 reported, citing a probable cause statement.

Officers transported Parker to a local hospital in a patrol SUV and administered emergency aid, the SLMPD said. The child was declared dead at the hospital, police said, First Alert 4 reported.

Officers allegedly learned that Ca’Marion Pawnell, the baby’s father, stored a gun beneath a mattress in one of the residence’s bedroooms by interviewing witnesses, including the 10-year-old. The minor confessed that he was aware of where the firearm was and had retrieved it before, according to the court documents.

Pawnell, 19, allegedly confirmed the gun belonged to him and he had placed it beneath the mattress. Pawnell has been charged with one count of second-degree felony murder, one count of endangering the welfare of a child resulting in death, and two counts of endangering the welfare of a child creating substantial risk, according to court documents. He remains held without bond, First Alert 4 reported. (RELATED: Inmates Seize Control Of Jail, Take Officers Hostage)

Prosecutors charged the 10-year-old with first-degree murder in juvenile court. He’s seemingly the youngest person in the history of Missouri to face a murder charge, the outlet reported.

Pawnell and the 10-year-old’s relationship is unclear, according to the New York Post. A 7-year-old child was inside the residence when the alleged shooting took place, First Alert 4 reported.

SLMPD directed the Daily Caller to its press release in response to a request for comment.