In this Aug. 12, 2019, photograph, Jennifer Mogensen holds a poster of her adopted sister, Jonelle Matthews, who went missing and whose remains were found in Greeley, Colorado. Steve Pankey was indicted in the 12-year-old's murder. Mogensen, who was a junior in high school at the time, said she had been playing varsity basketball the night her younger sister disappeared. (AP Photo/David Zalubowski)

Jim and Gloria Matthews, holding a picture of their daughter, Jonelle, are pictured during a press conference with District Attorney Michael Rouke, right, at the Weld County Courthouse. (Fort Collins Coloradoan-USA Today Network/Imagn)

Jennifer (Matthews) Mogensen, Matthews' older sister, said her family experienced "some closure" when they learned that her sister was murdered.

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