To assure himself of this, he poses as a Roman Catholic priest in order to meet Nina while she is held pending her bail appearance. Finding her wearing a crucifix necklace (which would be forbidden in her communist homeland), he thinks she's innocent when she does not confess to the murder.
To confirm his suspicions, he adopts the guise of a Roman Catholic priest to encounter Nina while she is being held before her court appearance. When he sees her wearing a crucifix necklace, which would be unacceptable in her communist country, he assumes she's innocent when she doesn't confess to the murder.