article_snippet: The heartbroken fiancée of a man who was killed in a mysterious motorcycle crash has appealed for help after police failed to solve the case.
article_snippet: North Yorkshire Police have received several responses after issuing an appeal for witnesses.
article_snippet: Those with information are being asked to either e-mail the traffic police on mcit@northyorkshire.pnn.uk or call the police non-emergency number on 101, asking for the North Yorkshire force and the major collision investigation team.
article_snippet: The reference number for the incident is 12140210210.
highlights_snippet: Miss Gregory has made an emotional appeal for the driver to come forward .