e.g. if Ray had shown the Receptionist the Victim Photo, they would have known that the Receptionist had only met a Imposter Victim and not be short a Witness.
Americadians: please name a general surface cleaning / sanitising product / multi-purpose disinfectant. Bonus points if it is pine-scented (which totally does not disguise the product but makes it worse). Something like "Detol" in the UK (or possibly even TCP - my boss likes the smell and keeps an open bottle in our office whenever the weather gets vaguely infectious)