You use his relatives.
They proved that that lady who claimed she was the sole surviving daughter of the Romanovs was a fake, by sampling a tumour she had removed, againt blood from the Duke of Edinburgh.(The Queens husband)
Saddo has 2 exiled daughters, who are believed to have supplied tissue samples a while back.
A times reporter doubted he was in there, because there was barely anyone bothering about searching the rubble afterwards.