The family of Gabby Petito have taken to social media to memorialize their daughter and encourage her fiancée, Brian Laundrie, to turn himself in.

Gabby Petito's mother, Nicole Schmidt, joined Twitter Saturday and tweeted "Mama bear is getting angry! Turn yourself in!"

Her step-father, Jim, posted a childhood picture of Gabby as his first tweet and wrote "It still seems surreal. Miss you Gabs."

Gabby's step-mother, Tara Petito, posted a picture of herself and Gabby as her first tweet and wrote "Gabby I will love you to the moon and back always and forever."

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Gabby's fatther, Joseph Petito, discussed his daughter's legacy tweeting: "She is already saving lives. So many stories being sent to us about relationships being left with proper planning for safety, and people are being found due to her influence. We have much more work to do, but it's a start. "

Gabby's parents have launched a foundation in her name earlier this week.