Loomers, 8 and a 2-year-old girl were killed by police as they tried to escape a home on Wednesday in Florida.
The children were found shot to death in the backyard of the home in Jacksonville.
A police officer was also injured.
The family of the slain toddler said she was trying to protect herself.
Police said the children were in the home with a 2 and a 6-year old.
A child protective service agency took custody of the children on Thursday.
The boy’s mother has been charged with child neglect and will face charges later.
The Associated Press contributed to this report.