Many wore white shirts to remember her life.
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"This has lifted the family up in what would otherwise be a terrible situation," said John Barr, her family's attorney.
Linda recorded her final moments before the explosion. She was getting ready for a cheerleading competition last February when suddenly there's a spark.
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Barr says the spark was the house filling up with natural gas and exploding, killing Linda.
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The family is suing gas provider Atmos saying negligence led to their child's death.