This is an update to the article: Donald Trump: Sweden Incident
In a tweet, Donald Trump clarified that his statement was based on a report on Fox News. The administration further clarified that Trump was not referring to a specific incident but to a general increase in crime that can be attributed to the refugees.
This clarification does not change the rating. In his initial statement, he gave a specific date which does imply a specific incident. It is possible that it was his intention to reference a story on Fox News but that is not what he said.