Maura repeatedly identifies the Cutthroat's mark as a "...Cyrillic letter 'K'...". However, of the Cyrillic letters that have the same forms as Roman letters (which 'K' is one), it is impossible to identify a single letter as Cyrillic without the context of other letters unique to that alphabet. Similarly, it would be impossible to determine whether a lone "P" was a Roman 'P' (representing the sound
The bride and her sister are identified as Croatians, but the Cyrillic alphabet which is identified as the source of the killer's mark is not used in Croatia. Cyrillic is used for the Serbian language (although the two languages are mutually intelligible).