August 5, 2016 6:33 PM EDT

Baltimore County Police said Friday that they believe an officer fired the bullet that struck the five-year-old son of Korryn Gaines, in a confrontation that went viral on Instagram.

Gaines, 23, was fatally shot by police earlier this week after she aimed her shotgun at the officer. Her son, Kodi Gaines, was also shot. He suffered non life-threatening injuries to his left cheek. An additional medical procedure was performed Friday at John Hopkins Children’s Center, according to the Baltimore County Government.

Originally, police said it was unclear whether Kodi Gaines was shot by his mother or by the officers.

The investigation is still ongoing.

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