Bijan Ebrahimi murder: Files on officers sent to CPS
Files on three police officers and a community support officer relating to their handling of events before a murder have been sent to prosecutors.
Bijan Ebrahimi, from Bristol, was killed and his body set on fire despite repeatedly calling Avon and Somerset Police for help.
The Independent Police Complaints Commission (IPCC) has sent the files to the Crown Prosecution Service.
Its investigation into the actions of other officers and staff continues.
Lee James, 24, who admitted Mr Ebrahimi's murder, was jailed for a minimum of 18 years.
Stephen Norley, who admitted assisting an offender, was jailed for four years by a judge at Bristol Crown Court.
The IPCC is investigating the actions of six other Avon and Somerset police officers and six civilian staff who dealt with Mr Ebrahimi.
He had wrongly been branded a paedophile before being killed.
IPCC commissioner Jan Williams said: "I have decided, based on the evidence and in line with our ongoing liaison with the Crown Prosecution Service, to send a file in respect of three police officers and one PCSO (police community support officer).
"I am sure the anniversary of Bijan's murder will be an especially difficult and poignant time for his family.
"We continue to update them, and all interested parties, on the progress of the investigation."