(CNN) A 3-year-old boy and his 1-year-old brother were on their own -- possibly for as many as four days -- after surviving a single-vehicle crash that killed their mother in south Arkansas. 
 
 The older of the two boys was found Monday morning after authorities received a 911 call about a boy who was seen walking by himself in a rural area on a state highway near Camden, Arkansas, Ouachita County Detective Nathan Greeley told CNN. 
 
 The boy was covered in cuts and scrapes and appeared to have been outside for an extended period, Greeley said. 
 
 "You could tell he was extremely traumatized," Greeley said. 
 
 The 3-year-old boy who, along with his 1-year-old brother, survived a car crash that killed their mother in south Arkansas. 
 
 Officials gave the boy a bath, food and a change of clothes and distributed a description of him. A family member contacted the sheriff's office and told authorities that the boy's 1-year-old brother was likely nearby, Greeley said. The relative also said the children's mother had not been seen since going grocery shopping on Thursday. 
 
 Read More ||||| EXCLUSIVE: Grandfather Calls Toddler 'Hero' for Saving Infant Brother after Mother Killed in Wreck Copyright 2018 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed. Video 
 
 OUACHITA COUNTY, Ark. - Along busy Highway 24 in Ouachita County, deputies say a wrecked car with a mother and her two small children inside went unnoticed for two days. 
 
 "She takes them everywhere she goes," says James Holliman. 
 
 James is in disbelief his daughter Lisa Holliman, 25, is dead. 
 
 "I'll never get up and see her, I'll never get to talk to her, laugh with her. My baby's gone," says Holliman. 
 
 It's what unfolded after the wreck deputies say is nothing short of a miracle. 
 
 "They went through a pure hell, no doubt," says Ouachita County Sheriff's Detective Lt. Nathan Greeley. 
 
 Holliman's three-year-old grandson Kylen managed to get out of his car seat, through the sunroof then up a small hill filled with bushes. 
 
 "When he climbed out of that car, seeing his mother dead like that like she was, he tried to wake his mom up," says Holliman. 
 
 Greeley says when they found the car, they found the boys' mother nearby and Kylen's one-year-old brother still fastened to his car seat. 
 
 "He was somewhat turned sideways, in a position upside down," says Greeley. 
 
 Investigators say it's by the grace of God the children survived not only the wreck, but made it two days without food or water. 
 
 "It was hard to see my grandson, you know, laying there like that... all cut up," says Holliman. 
 
 Holliman says losing his daughter may be the hardest thing he'll go through. He says it's even more difficult knowing his daughter was four weeks pregnant. 
 
 "We just found that out at the hospital that she was pregnant. We didn't know. We lost two," says Holliman. 
 
 Both boys suffered dehydration. 
 
 The one-year-old is recovering at Arkansas Children's Hospital and is expected to survive. 
 
 The cause of the wreck remains under investigation.
– "They went through a pure hell, no doubt," says an Arkansas sheriff's detective about the ordeal two small children somehow managed to survive—all thanks to the eldest of them, a 3-year-old named Kylen. The boy was found wandering alone on a state highway near Camden, Arkansas, on Monday, CNN reports. He was scraped up and "extremely traumatized," says Ouachita County Sheriff's Detective Lt. Nathan Greeley, per CNN. It was upon trying to reconnect the child with family that they learned his mother, Lisa Holliman, had last been seen going to the grocery store on Thursday; she also had a 1-year-old son. A search led to Holliman's overturned car in a ravine, apparently the result of a single-car crash and not visible from the road. The infant was found strapped in his car seat alive; Holliman, 25, had been ejected and was dead. "We're still trying to determine the timeline, but the mother was last seen Thursday," Greeley said. "This is one of the most remarkable things I've ever experienced in my 11 years at this department." Holliman's father, James, tells KARK that Kylen was able to unstrap himself and exit the car through the sunroof. "When he climbed out of that car, seeing his mother dead like that like she was, he tried to wake his mom up," he says. The boys survived without food and water; the temperatures were high and thunderstorms came through the area. "It's nothing short of a miracle," says Greeley. But still, a tragedy: Holliman's family learned she was four weeks pregnant at the time of her death. The crash remains under investigation.