(CNN) A week before 9-year-old Emma Hernandez was mauled to death by three pit bulls in Detroit, her father got into an argument with the dogs' owner about them roaming free in the neighborhood, family members told CNN affiliate WDIV.

Emma was riding her bike near her home in Southwest Detroit on Monday when the dogs escaped from the neighbor's yard and attacked her, the station reported.

A week earlier, her father, Armando Hernandez, had an argument with the dogs' owner about better fencing for the dogs, Emma's aunt Claudia Stapleton told the news station.

"They didn't do anything," Stapleton said.

A memorial to Emma has been placed her neighborhood.

Witnesses tried to save the girl and police said that someone shot one of the dogs. Emma was rushed to the hospital, but died from her injuries.

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