The family of a central California woman killed after a lawn mower operator ran over her is demanding more answers about her bizarre death.

A landscaper operating a John Deere tractor pulling a mower ran over 27-year-old Christine Chavez in an overgrown area on property owned by a winery in Modesto, California on July 8. The driver didn’t realize he had run over Chavez until he saw her body, according to his employer, Grover Landscape Services Inc.

That doesn’t make any sense to Chavez’s parents. They are criticizing Modesto police’s handling of the case, saying investigators left pieces of her remains at the scene. On Tuesday, the family held a protest in front of the department to draw more attention to Chavez’s death, and say further demonstrations are planned.

Department spokeswoman Sharon Bear sent USA TODAY a brief, factual description of what happened and did not respond to additional questions, including about the family’s criticism.

Although the family says they’ve been told the case was closed, Bear said it remains open.

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Unanswered questions

A makeshift memorial for Christine Chavez is shown in Modesto, California.

Statements provided by the landscaping company, the winery and the police department describe Chavez’s death as accidental, with the company saying that the area where she was run over was overgrown.

E & J Gallo Wine Co., which owns the property and hired the landscaper, said Chavez “was not visible and laying in a tall, weeded area.”

When the landscaper noticed Chavez’s body, he immediately called 911, the police said.

Chavez’s father, Cristobal Chavez, said he has operated such a mower and that it makes no sense that the landscaper didn’t see his daughter or at least feel her when he ran over her.

“Police told us that it was an accident and that’s all,” he told USA TODAY this week. “They don’t care, they don’t want to investigate.”