Who is Cleo L. Madonia?

After findingthis photo of a grave marker online, the Finding Cleo team heads to the United States to investigatefurther.

The grave site of Cleo L. Madonia, 13, which is located roughly 20 hours away from Arkansas, where the Semaganis siblings believe their sister Cleo is buried.

CBC's Connie Walker examines old yearbooks at a U.S. high school, searching for students who resemble Cleo Semaganis.

A news story from December 7, 1978 catches the Finding Cleo team's attention at a local reference library located near the gravesite of Cleo L. Madonia.

Cleo Madonia, in the yellow shirt, in her Grade 5 class photo, taken in 1975.

Cleo Madonia's Grade 8 school photo, taken in 1977 or 1978.

Cleo's older brother Johnny, visits her grave for the first time after learning she was adopted by a family and lived not far from where he grew up in Pennsylvania.

More:

• Listen to Missing & Murdered: Finding Cleo
• See photos of the Semaganisfamily
• Lillian's life
• Little Pine First Nation
• Saskatchewan's Adopt Indian Mtis program