A brother of Fifty Shades Of Grey author E.L. James is on trial accused of killing an elderly woman in a car crash.

Daniel Mitchell allegedly drove his Porsche into the back of 73 year old Mollie Haines' car near Buckinghamshire, England last July (13).

Haines had broken down and had her hazard lights on after trying to restart her car. She died instantly when her vehicle exploded.

Mitchell was arrested at the scene and is currently on trial at Aylesbury Crown Court in England for careless driving. He denies the charge.

The trial continues.