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'I am so sad': Strangers mourn Gabby Petito

Friday marks a week in the search for her fiancé Brian Laundrie.

NORTH PORT, Fla — The memorial for Gabby Petito is growing as each day passes without answers about how she was killed.

Strangers are coming together to grieve her death, including a Parrish, Florida, woman who drove about an hour to put up posters of Petito in front of Brian Laundrie's family home.

A federal arrest warrant was issued Wednesday for Laundrie, in connection to Petito's case.

“I strongly feel they gave him time to get away. Period. I am so sad," said Terri Desesso, referring to the Laundrie family. They have not recently spoken about the case.

RELATED: TIMELINE | The disappearance and death of Gabby Petito: What we know

Desesso, a grandmother who has no ties to either family, put up posters of Petito in the Laundrie's front yard. It reads: "I was here once."

The posters show the last picture Petito posted on her Instagram page before her disappearance.

"[Police] should’ve had their eyes open all the time," Desesso said. "Even if she fell down and killed herself or accidentally hit the rock, you just do something about it."

RELATED: Brian Laundrie's parents' actions questioned following Gabby Petito's disappearance

The FBI announced Sunday, Sept. 19, that a body had been found matching the description of Petito. On Tuesday, Sept. 21, the coroner's office confirmed the body was hers and initially ruled the death a homicide.

"You’re engaged to somebody," Desesso said. "It’s like people treat dogs better than humans."

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