In 2010, Joanna Simpson, 46, was bludgeoned to death in Ascot, Berkshire, with a claw hammer by her estranged husband Robert Brown. Her young children, who were just nine and 10, were in the house.

Hetti Barkworth-Nanton's friend, Joanna Simpson, was killed by her husband ... Ms Simpson, 46, was bludgeoned to death by Robert Brown in Ascot, Berkshire, in October 2010. He buried her body ...