Somapat Sitiwatjana leaves Preston Crown Court after he gave evidence in the trial of Sarah Williams who is accused of the murder of Sadie Hartley. PRESS ASSOCIATION Photo. Picture date: Monday July 25, 2016. Williams, 35, had a relationship with Sitiwatjana, 47, after he taught her to ski at Manchester's Chill Factore indoor ski centre five years ago. See PA story COURTS Hartley. Photo credit should read: Danny Lawson/PA Wire