Reckless Driver or Blameless Mother?

A mother wakes from a coma to learn her worst nightmare has come true. Six weeks earlier, she had been involved in a multi-car smash at a busy junction. Tragically, her 5-year-old son is dead. Was the mother, who remembers nothing of the incident, speeding? And did she jump a red light? The Prosecution says she's to blame and is charging her with manslaughter.