The Independent Police Complaints Commission has served notices of investigation on five officers in connection with a death in custody.
The notice is for a new inquiry into events leading up to the death of Sean Rigg at Brixton police station in 2008.
Senior arresting officer PC Andrew Birks is among the officers being investigated.
He was due to resign on 1 June but the Metropolitan Police force reversed a decision to allow him to quit after a campaign by Sean’s family.
He was suspended last month.
A 37 year old man has received £40,000 compensation from Merseyside Police after he was punched and sprayed with CS gas during a wrongful arrest.
John Spencer was assaulted by an officer in 2012 after he denied making improper phone calls to a former friend.
His mother Susan, who witnessed the incident, was awarded £10,000. John said, “It’s mentally destroyed me—I can’t trust the police again.”
Four further police officers are being investigated by the Independent Police Complaints Commission over the treatment of Bijan Ebrahimi in Bristol.
Bijan was beaten, set on fire and murdered by neighbour Lee James last July following rumours he was a paedophile.
He had previously complained to police of harassment by neighbours.
Sixteen officers and civilian staff are under investigation.
Three officers are under investigation of criminal offences. The four additional notices of misconduct have been served on an inspector and two sergeants.
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