Investigators released a surveillance image Tuesday, taken of Genelle Conway-Allen just moments before she was last seen last week.
Conway-Allen was last seen leaving her school in Suisun City Thursday, and found Friday in Allen Witt Park in Fairfield.
In the surveillance image taken of her, she is wearing a grey hoodie, blue jean-style leggings, white sneakers and a white headband. Her hair was up in a bun. She was also carrying a pink backpack.
Investigators want anyone who may have seen Conway-Allen last Thursday to contact them at (707) 428-7345.