"I see," Holmes' eyes narrow at the words 'killing curse'. He fills his pipe and lights it. "Please feel free to smoke Mr Dumbledore." He puffs thoughtfully. "There is no possibility of error? No...state of suspended animation perhaps?" His eyes slide over Severus. He jots a note.
Holmes makes no comment at the display, merely wonders if anything of a medical nature might be needed. "I apologise if my questions disturb either of you, but I believe this is very significant." He taps his notebook.