Cantrell told local news outlets that the 9-year-old boy shot his 13-year-old sister in the back of the head.
The girl was rushed to a children's hospital in Memphis, Tennessee.
Investigators say they're unsure how the boy gained access to the handgun, the Clarion Ledger reports.
Cantrell says the two siblings were playing the game when the shooting happened. "I don't know if he knew exactly what this would do". It's also unclear how much knowledge the boy had of the dangers of guns.
Elaborating, Cantrell expressed concern regarding whether or not the boy actually understood the effect that using a gun on a person would have. I can't answer that.
Feinstein Tells CIA To Declassify Docs About Haspel's Torture Involvement
To her, and to our readers, we can only apologize, correct the record and make certain that we do better in the future. In this instance, we failed to understand the message the CIA's press office was trying to convey in its statement.
The children's mother was in another room feeding other children lunch when the shooting occurred in a bedroom where the video game was being played, Fox News reported. "We don't know yet what kind of charges or if charges will be pressed".
They said the boy grabbed a gun on Saturday afternoon after his sister would not give up the controller. "I do know its a tragedy". We want to make sure we're doing everything correctly.
The victim has been named locally as Dijonae White who was a student at Tupelo Middle School.
We are learning more about the fatal shooting of a 14-year-old girl in Monroe County that law enforcement says was committed by her 9-year-old brother.