There is massive concern over the death of a young man, Edir Frederico Da Costa, (known as Edson) after he was arrested by the police in the borough of Newham, East London.
Edson was pulled up in a car by police on 15 June.
The IPCC C said, “It is believed police officers used force and deployed CS spray” against Edson.
His family say Edson’s injuries included a broken neck, a fractured skull and a ruptured bladder.
A GoFundMe page has been set up to support the family. The page asks people to help “get justice for the cruel and brutal beating of a father, a son, a brother, cousin, uncle and dear friend”.
Edson was in hospital for six days on life support before his death.
Support the campaign – Protest at Forest Gate police station, 2pm, Sunday 25 June. follow #Justice4Edson and #JusticeForEdson on Twitter. Make a donation to support the family at www.gofundme.com/justiceforedson