The British Airways Killer | Preview (ITV1)

This new two-part documentary explores the death of Joanna Simpson, a wealthy heiress who was killed by her husband, a British Airways pilot.

With access to unseen police interview tapes, this programme tracks the Thames Valley Police Major Crime Unit's complex investigation into the death of Joanna, and speaks to her friends and family to paint a vivid picture of the crime and its aftermath.

When the mother-of-two disappeared from their house in an affluent area of Ascot on Halloween night in 2010, Brown called police the next morning to report a domestic issue. Yet when he handed himself in, he refused to help police with their missing persons investigation, despite having brutally bludgeoned her to death with her children listening in their playroom.

Eventually he confessed that he had killed her and told the police where to find the body.  This documentary tracks the case from that first phone call to the tragic discovery of her remains in a shallow grave in Windsor Great Park, to his conviction and the consequences - taking in an acrimonious divorce and the pre-nuptial agreement of a wealthy heiress that was to change British legal history.

In the first episode, with full access to unseen Robert Brown police interview tapes, the first episode goes inside the complex investigation by Thames Valley Major Crime Unit, from the first phone call by Brown to the gathering of evidence by officers, while family members and friends recount their memories of Joanna and the couple's relationship.

The British Airways Killer begins Monday 26th February on ITV1.