Claudia Lawrence case: the background

March 2009: The investigation into Claudia Lawrence's disappearance started the day she failed to turn up to work.

More than a hundred officers were on the case and police confirmed their belief she was murdered.

Police received more than a thousand calls from the public, as they searched almost 1300 properties around York and the university.

Later that year detectives even extended their search abroad, to Cyprus and Ireland.

2010: the number of officers working on the case were scaled back. A cash reward for information was dropped.

2013: Cash reward reinstated after a review of the case was ordered. Police searched her house once again.

Our correspondent Frances Read looks back at days and months and years after Claudia disappeared, and the case that gripped the country: