She fought to save her son but paid a terrible price

The only clue to find a killer was some footprints in the snow

Beneath the brightly wrapped gifts lay a grim and heartbreaking discovery

Before they could celebrate the new year, she shot him dead

A day of joy became a bloodbath

A mother vanished at sea, her son – rescued after eight days – said it was an accident, but as a popular new Netflix film examines the evidence, it raises questions about another family death...