The Harris County Sheriff's Office charged three adult males and one juvenile in the Capital Murder of 4-year-old Ava Castillo.
The men have been identified as Ferrell Dardar, 17, Marco Miller, 17, Phillip Battles, 18.
Little Ava was shot and killed during an attempted robbery on November 14 outside her home. Her mother, Diana Gomez and her sister Betsy were also shot, and both survived.
The horrible incident made headlines around the country, prompting a search for the vehicle used in the incident.
The black Honda turned out to be a stolen car and was later found with no trace of the suspects.
The Harris County Sheriff's Office Homicide Unit is continuing its investigation into Ava's murder. The investigation is being conducted in co-ordination with the Sheriff's Office Robbery Unit and Houston Police Department.