A Metropolitan Police officer accused of assaulting the terrorist suspect Babar Ahmad is suing the force for racial discrimination.
Pc Mark Jones, 43, is one of six police officers going to an employment tribunal over an incident in June 2007.
The officers claim they faced racial discrimination after stopping and questioning two 16-year-old boys on suspicion of robbery in west London.
The Territorial Support Group officers launched the proceedings in mid-July.
Pc Jones and three officers who are not involved in the discrimination claims are accused of assault causing actual bodily harm on Mr Ahmad, 36, during his arrest in Tooting, south London, in 2003.
A Metropolitan Police spokeswoman said: "I can confirm that Pc Mark Jones and others have submitted an employment tribunal claim citing racial discrimination."
A Tribunals Service spokesman said a date had yet to be fixed for the hearing.
The five other officers suing the Met are Sgt William Wilson, Pc Steven White, Pc Giles Kitchener, Pc Simon Prout and Pc Neil Brown.
All six officers allege they were the victims of racial discrimination in the aftermath of an incident in which the two teenagers were stopped and questioned on Edgware Road.