Nottinghamshire Police questioned the Championship star following a serious road crash which resulted in the hospitalisation of one man.
A Porsche, a Volkswagen Polo and a Vauxhall Astra were involved in a three-car crash in Winthorpe, Nottinghamshire, on Friday.
A 35-year-old man had to be air-lifted to Queen's Medical Centre in Nottingham with serious injuries.
King was released on police bail.
The striker was imprisoned for 18 months in October 2009 after breaking a woman's nose in a nightclub.