The first thing Douglas Galbraith noticed that warm night in 2003 when he arrived home from a work trip was that the curtains were open.
This was unusual. It was 10pm, and the two sons he shared with his Japanese wife Tomoko – six-year-old Satomi and four-year-old Makoto – should have been in bed.
With no key and no one answering the door, he took a screwdriver from the garage and forced his way in to the family home in rural Fife.
Inside he found a chilling scene. On the bedroom floor lay…