UPDATE: The family says Priscilla is still in critical condition, but is slowly getting better. They say she is steal dealing with broken facial bones and a broken leg. They say if she pulls through, recovery could take months.
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Relatives said Maria De Lourdes Castillo, 70, was the driver killed after her sedan collided with a school bus near Nellis and Carey Thursday morning.
"She went to take Priscilla to school," said son Americo Castillo, "she didn't think this was going to happen."
At least 12 students on the bus who were hurt were treated at University Medical Center with moderate injuries. The bus driver was also treated at the hospital and is expected to be OK.
RELATED: Witnesses and others talk about deadly crash involving school bus
The beloved 70-year-old sedan driver had four children and seven grandchildren.
One of Maria's grandchildren, Priscilla, was in the passenger seat of the sedan.
Police said the 10-year-old was critically injured.
"She got out of the operating room ... and she started getting worse," said Castillo.
Evidence revealed that the school bus was hit by the sedan after the sedan's driver ran a red light, said police.
The family is not sure whether a medical episode could have possibly triggered the accident.
The investigation as to the specific cause of the wreck continues.
Meanwhile, the school district is standing by the driver of the bus.
"Bottom line is, the bus driver at this point, we're celebrating," said Capt. Ken Young of the Clark County School District Police Department.
The Castillo family has set up a GoFundMepage to cover medical expenses.
13 Action News will continue to follow this developing story.
