According to an article in the Skagit Valley Herald, prosecutors in the Williams court case are seeking Hana Alemu’s uncle to testify to verify her age. Her body was exhumed for that purpose, but the examination proved to be inconclusive. The reason they need her age is that the charge they are trying to prove is only valid for children under 16 years of age.
I should mention that in the Remembrance of Hanna Williams group on Facebook there is a scan of Hana’s Baptismal Certificate as well as a higher quality version a member fixed. I should also mention that Hana was born on March 8, 1997 (1/8/1989 according to the Ethiopian Calendar which is different from ours.) She died on May 12, 2011.