On 7 January 2003 , PC Walker was dragged 100 yards .
On 7 January 2003 , PC Walker was fatally injured by a stolen taxi as he reached into the vehicle to attempt to remove the keys from the ignition .
On 7 January 2003 , PC Walker was dragged 100 yards and fatally injured by a stolen taxi as he reached into the vehicle to attempt to remove the keys from the ignition .