Exclusive: A crypto-based dossier could help prove Russia committed war crimes

In early March, a Telegram user posted a photo of wreckage at a school in a suburb of Kharkiv, Ukraine. The photo showed the side of a classroom with a large blast hole and a pile of debris including desks and chairs.In early March, a Telegram user posted a photo of wreckage at a school in a suburb of Kharkiv, Ukraine. The photo showed the side of a classroom with a large blast hole and a pile of debris including desks and chairs.