A review into the Independent Police Complaints Commission (IPCC) handling of the death of a man in custody is under way.
Sean Rigg, 40, who suffered from schizophrenia, died in police custody after he was arrested in Weir Road, Balham, 2008
An initial investigation by the police watchdog in 2008 found there was no wrong doing, but last year an inquest jury ruled police used an "unsuitable" amount of force when they arrested the musician.
A new review is taking place, which is revisiting the decision of the previous commissioner to not make a referral to the Crown Prosecution Service.
The review will look into whether any officer should be referred to CPS regarding the arrest, restraint and detention of Mr Rigg.
It will also revisit the decision whether any police staff has a case to answer for misconduct and whether to recommend disciplinary proceedings.
Investigators, led by a senior investigator, are considering evidence and have met with the Rigg family, who live in Tooting.
Mary Cunneen, IPCC Commissioner, said: "I have met with Mr Rigg’s family and legal representatives to outline the remit of our review and the terms of reference have been agreed.
"A dedicated team of investigators, led by an experienced senior investigator, has already begun to consider the evidence and I will ensure this review is conducted as efficiently but more importantly as thoroughly as possible.
"If during the course of the review issues arise that require further evidence for me to consider previous decisions in relation to this case, the IPCC will consult with Mr Rigg’s family and his representatives, the MPS and any officer likely to be affected, to determine whether to re-open the investigation."