Miami-Dade police Tuesday charged Jordyn Alexander Howe with manslaughter and carrying a concealed firearm in the death of Lourdes Guzman-DeJesus in Homestead, The Miami Herald reported.
An arrest affidavit said the gun went off when Howe pulled the weapon out of his back pack to show it off. Guzman-DeJesus was struck in the neck.
She was flown to Miami Children's Hospital, where she died, officials said. No one else was injured.
Howe was taken to Miami-Dade police headquarters, where he gave a sworn statement, the affidavit said. He later was taken to Miami-Dade Juvenile Assessment Center.
The Miami-Dade homicide unit is handling the case because Homestead does not have homicide detectives.
Guzman-DeJesus and her younger sister were among eight students on the private bus transporting the children to three Homestead-area charter schools.
Guzman-DeJesus was born in New Brunswick, N.J. Her mother, Ady DeJesus, is recreation director for Coral Reef Nursing and Rehabilitation Center in Miami, the Herald said.
In a statement, DeJesus called her daughter "a beautiful angel" who was an honor roll student and loved her siblings.
"Feels like just yesterday I saw her running around in her Pamper, dancing and modeling for the camera," she said. "Times and moments spent with Jina are memories I will cherish and keep in my heart forever."