Police hunting the murderer of a man from Colindale are appealing for information a month after his death.
Alan Bailey, 66, was found dead in his home in Boycroft Avenue on March 3, following a call from neighbours who were concerned he had not been seen for some time.
A police spokesman said Mr Bailey lived most of his life in the area, and was a recluse by nature, known to search restaurant bins for food.
His appearance was described as unkempt.
On November 27 last year, it is thought Mr Bailey was a victim of robbery while he was searching for food behind Pizza Hut in Kingsbury Road in the early hours of the morning.
He then tried to get home, but made it to Lewgars Avenue before collapsing just metres from his house.
He was taken to Northwick Park Hospital and was later discharged.
The spokesman said a post mortem gave cause of death as multiple injuries, and also established he may have been dead for a number of months.
DI Presland, the officer in charge of the murder investigation, said: "This was a particularly brutal attack on a defenceless and vulnerable elderly man.
"The robbery may have been a motive, but given the victim's unkempt appearance, it is equally possible he was targeted simply for mindless amusement.
"I would appeal to any witnesses to the incident and anyone else who may have seen him on this day or may have known him to please come forward".
Two men aged 19 and 20, two 14-year-old boys and a girl, 14, were arrested in connection with the incident on March 26 and 27.
All five were later bailed to return to a north London police station in early July pending further inquiries.
Police still want to hear from anyone who saw Mr Bailey in Lewgars Avenue or the surrounding streets on the night of Monday, November 11, through to the following day.
They are also keen to speak to anyone who may have known him in order to piece together Mr Bailey's movements on that night.
Anyone with information is asked to call the incident room on 020 8358 0200, or to remain anonymous, call Crimestoppers on 0800 555 111.
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