At 5.15 p.m. Harvey Ellis was trapped - stranded in a line of eight cars by a blizzard on a Norfolk coast road.
At 8.15 p.m. Harvey Ellis was dead - viciously stabbed at the wheel of his truck.
And his killer has achieved the impossible: striking without being seen, and without leaving a single footprint in the snow . . .
For DI Peter Shaw and DS George Valentine it's only t...more