Police have issued an appeal for witnesses after a second was released on bail after a woman was killed while walking her three dogs in west London last month.
Olivia Riley, 41, from Suffolk, was found dead at the scene, while all the dogs died as a result of injuries, according to police.
A crime scene cordon was in place on the mansion-lined road that stretches along the Thames.
A 30-year-old man was arrested on suspicion of causing death by dangerous driving on May 27. He was taken to a west London police station and subsequently bailed until a date in late June.
The driver of the car, a 26-year-old man, was also arrested on suspicion of causing death by dangerous driving and taken into police custody. He has also subsequently been released on bail to a date in late June.
Anyone who witnessed the collision, particularly anyone who captured it on a dash-cam or other camera, should call 101, providing the reference 1500/14MAY.
Information can also be provided to Crimestoppers, anonymously, by calling 0800 555 111.