From the article (see also news video):
They say the 10-year-old boy first said the shooting was an accident; he later admitted he shot Albright on purpose. It is not clear if the boy understood the potential finality of that gunshot.Every gun in the hands of a child first had to go through the hands of an adult.
In Tuesday's hearing, Assistant District Attorney Pittman Morris shared the state's theory of what happened. Morris says Albright was changing her baby daughter's diaper when something upset the 10-year-old. He allegedly retrieved the shotgun he'd been given for Christmas and shot Albright.