ATTALLA, Ala. (AP) — Roger Simpson said he looked down the road and saw a little girl running outside her home but didn't give it another thought. Police, however, said the man witnessed a murder in progress.

Authorities say 9-year-old Savannah Hardin died after being forced to run for three hours as punishment for having lied to her grandmother about eating candy bars. Severely dehydrated, the girl had a seizure and died days later. Now, her grandmother and stepmother who police say meted out the punishment were taken to jail Wednesday and face murder charges.

Witnesses told deputies Savannah was told to run and not allowed to stop for three hours on Friday, an Etowah County Sheriff's Office spokeswoman said. The girl's stepmother, 27-year-old Jessica Mae Hardin, called police at 6:45 p.m., telling them Savannah was having a seizure and was unresponsive.

Simpson said he saw a little girl running at around 4 p.m., but didn't see anybody chasing or coercing her.

"I saw her running down there, that's what I told the detectives," Simpson said from his home on a hill overlooking the Hardins. "But I don't see how that would kill her."

Authorities are still trying to determine whether Savannah was forced to run by physical coercion or by verbal commands. Deputies were told the girl was made to run after lying to her grandmother, 46-year-old Joyce Hardin Garrard, about having eaten the candy, sheriff's office spokeswoman Natalie Barton said.

Savannah Hardin died Monday at Children's Hospital in Birmingham, according to a news release from the sheriff's office. The sheriff's release said an autopsy report showed the girl was extremely dehydrated and had a very low sodium level. A state pathologist ruled it a homicide.

The sheriff's office received calls from concerned citizens who witnessed the girl running. No other details were released, but an official with the local volunteer fire department said rescuers thought something seemed odd when they responded to a call about the child.

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"One of the ones who were down there said he didn't feel like everything was right," said Ruby Ward, vice president of the Mountainboro Volunteer Fire Department.

Gail Denny and her husband Phil, live just up a dirt road from the home. They've known the family since they moved to the area in northeastern Alabama seven years ago.

The couple said they were used to seeing Savannah and other neighborhood children out waiting on the school bus in the morning. Gail Denny said her grandson had a crush on Savannah.

"My grandson asked her to be his girlfriend on Valentine's Day, and she said 'yes,'" she said before dissolving into tears. She left a candle and stuffed animal outside the girl's home Wednesday night, saying a prayer as she paused beside the road.

The trailer where Savannah lived was surrounded by a wooden fence, playground equipment and toys. Neighbors say they never saw children playing in the yard.

They told The Associated Press that Garrard owned a lot of property along the road and much of her family lived in homes on that property.

"It seems like a very happy extended family around here," Denny said. "There are mothers, grandmothers, kids. It sounds like a punishment that got out of hand."

Garrard and Jessica Mae Hardin are being held in the Etowah County Detention Center, each on a $500,000 cash bond.

Court records show that Robert Hardin filed for divorce in August of 2010. In his complaint, he asserted his wife was bi-polar and had alcoholic tendencies. He accused her previously of having run off with the couple's own child. In her response, Jessica denied all of Robert's allegations.

Five months after filing for divorce, the two asked a judge to dismiss their case.

Savannah Hardin was a third-grader at Carlisle Elementary School. Superintendent Alan Cosby said her desk had been turned into a makeshift memorial where her classmates could leave notes and mementos. He said counselors and social workers were made available for students.

"This is obviously a very tragic, devastating, heartbreaking situation," Cosby said. "Nothing like this has ever happened before."