Complex sentence: O'Donnell was arrested and sent back to London to stand trial at the Old Bailey and was executed for murder on the high seas, on 17 December 1883 at Newgate prison, aged 48.
Split into simpler sentences: O'Donnell was arrested for murder and sent back to London to stand trial at the Old Bailey. He was executed on 17 December 1883 at Newgate prison, aged 48.