Police are still investigating the murder of a taxi driver a year after the unprovoked beating that led to his death, just days before Christmas.
Carl O'Brien was so badly beaten on his own doorstep last December that he was unable to recover and passed away after three weeks in hospital.
The 55-year-old cabbie, who died on December 23, was attacked at his home in Wallington, south London.
Now police investigating the murder have offered a £20,000 reward to anyone who helps them take down the killers.
A 26-year-old man was arrested and charged with his murder, but was found not guilty by a jury during his trial at Isleworth Crown Court in October.
Following the acquittal, the case is still open and detectives are appealing for any new information that may lead them to the person who carried out the attack and caused his death.
Detective Inspector Jo Sidaway, leading the investigation, said: