Review what to do when someone dies

This book from Nicci French, tells the reader a story from a woman (Ellie Falkner) that tries to discover the truth about his deceased husband that apears to have died in a car accident,but he was with a suspicious woman in the car,was him cheating? or he has been murdered?
The more Ellie tries to know the more she turns in to the suspect...
Some times is safer to keep silent when someone dies.