Murder trial jury told defendant already convicted of strangling cellmate while on remand

James Desborough, on trial at Winchester Crown Court for the murders of Claudio Aquilino and Daniel Coleman near St Austell, was convicted in March 2026 of strangling his cellmate Steven Kempster at HMP Exeter in September 2025 — while on remand for those same killings. The prosecution presented the conviction to the jury as agreed facts. Desborough denies both murders but admits preventing their lawful burial. The case raises questions about prison cell-sharing risk-assessment protocols.