How did CNN know the journal Arwa Damon found was really Ambassador Steven's?

CNN confirmed that the journal found by Arwa Damon belonged to Ambassador Chris Stevens through identification details within the journal itself, including personal notes and references that matched Stevens' experiences and role as the U.S. Ambassador to Libya. Additionally, the U.S. State Department and other officials corroborated the journal's authenticity, providing further verification of its ownership. This confirmation was crucial in reporting on the circumstances surrounding Stevens' death during the 2012 Benghazi attack.