DELAWARE COUNTY, Ind. - A 13-year-old remains in critical condition after a crash that killed her father, his girlfriend and her friend on Sunday.
Savanna Kalley, 13, and two others survived the crash that killed Kent Kalley, 47, Lisa Case, 47, and Andrew Lackey, 12.
Trace Joiner, 13, and Jessica DeLong, 12, were both in stable condition at Riley Hospital for Children Monday night, while Savanna Kalley was in critical condition.
Delaware County investigators are working to figure out what caused Case, who was driving, to lose control at a speed estimated between 73 and 90 mph, rolling the SUV over.
Authorities have ruled out a mechanical error, and they do not believe drugs or alcohol were involved.
"It's absolutely mind boggling, I guess, on why these types of things have to happen to people who didn't have anything to do with the decision making process," said Lt. Arlan Johnson.
Aaron Kalley, Kent Kalley's son, said he'll remember his dad's generosity.
"(He was) the most altruistic person I've ever met," Aaron Kalley said. "He wanted to help everyone and do everything he can to help everyone."
In the midst of mourning the loss of his father, Aaron Kalley has been by his little sister's side in the hospital.
"It was awful, gut wrenching, but she's doing good," he said. "She's smiling, she's talking, so they think that she'll make a pretty good recovery."
The children are classmates at Yorktown Middle School, where Lackey was known for being kind, loving football and riding BMX bikes with friends.
"Everybody was pretty devastated today because he had a lot of friends. It was sad," said Yorktown Middle School student Jacob Richards about the loss of Lackey.