Detectives are appealing for information on the sixth anniversary of the murder of Davion Watt.
The 26-year-old was shot dead in Brixton in 2008. No murder weapon has ever been recovered.
No one has been prosecuted for the crime and police are renewing a plea for witnesses to come forward.
"Without anyone coming forward we fear that Davion's family may never get the justice they so desperately want. With our anniversary appeal, we hope that the intervening years since Davion's murder have seen the allegiances change of those that may have kept silent. And that those people can now re-examine their consciences and consider doing the right thing and help us prosecute those responsible, bringing closure to the case for Davion's family."
An elderly man, who was murdered in Hackney on Thursday, has been named as Ngoc Giam Dang.
The 75-year-old died due to a head injury.
An ambulance was called to an address in Geffrye Court, N1, In the early hours of Thursday morning.
Mr Dang was taken to the Royal London Hospital but died within a few hours.
A woman was arrested at the scene and later released. A man was also arrested on suspicion of murder and has been bailed until August 13.
A murder investigation has been launched following the discovery of a body in a New Barnet flat after a fire on Thursday.
Firefighters who tackled the blaze at Sheridan Lodge on Potters Road called police when they discovered the body of 49-year-old Antonio James Tammaso, who lived alone in the flat. They also found a petrol can in one of the rooms.
Initially the death was thought to be non-suspicious, but a post mortem examination on Friday was inconclusive and indicated that Mr Tammaso had suffered a number of wounds prior to the fire.
Police are appealing for information, especially from anyone who may have seen someone carrying a red petrol can.
A murder investigation has been launched after a man was stabbed in Stratford on Monday.
The 22 year-old was stabbed in the neck in the Broadway area just after 8pm.
He was taken to an east London hospital where he died later that evening.
No arrests have been made.
Police were called to an address in Tower Hamlets this morning following reports of a serious assault.
Upon their arrival at Sandall House near Victoria Park, officers found a 60-old-woman suffering from severe head injuries and a wound to her chest.
The woman was pronounced dead a short while later.
A male youth was arrested at the scene on suspicion of murder and has been taken to an east London police station.
Police are not looking for anyone else in connection with this incident.
Robert Richard Fraser has been arrested by police following the murder of London sex worker Maria Duque-Tunjano.
Fraser was arrested last night in the Leicester Square area of London following appeals by the Metropolitan Police. He has been taken to a central London police station for questioning.
Police investigating the murder of a prostitute in West London have released CCTV footage of a man they are trying to track down. The body of Maria Duque-Tunjano was discovered at a flat in Earls Court on Friday.
Police also want to speak to Robert Richard Fraser an attack on another sex worker in Paddington. Fraser is also known as Robert Aleem and Shia Robert Jackson, and Scotland Yard says that anyone who sees him should call 999 immediately.
The CCTV footage was taken in central London on Sunday 2 February, and detectives believe that he may still be in central or north west London.
Detectives hunting a man wanted in connection with a sex worker killing said that it is "imperative" they trace him "as soon as possible".
Robert Richard Fraser is wanted in connection with the death of prostitute Maria Duque-Tunjano and an attack on another woman in Paddington, London.
We have established that Maria was last seen alive on Tuesday, 28 January. We also understand she was in the company of a man and our primary focus is to trace him as part of this investigation.
It is now our belief that this man was also responsible for an attack on another female sex worker in Paddington. It is imperative that we trace him as soon as possible.
We have spoken to organisations with links to those who work in the sex industry to make them aware of this incident and pass on the message that personal safety of sex workers is of paramount importance.
Detectives are hunting for a man suspected of murdering a sex worker in west London.
Maria Duque-Tunjano, 48, who was a British national originally from Colombia, was found dead on Friday in a flat in Earls Court.
She had died after being hit over the head with a blunt object, a post mortem examination found.
Robert Richard Fraser, also known as Robert Aleem and Shia Robert Jackson, is wanted in connection with the murder and police also want to question him about another attack that took place in Paddington.
Police enquiries found that Ms Duque-Tunjano was a sex worker and it is believed she was robbed of a quantity of money during the attack.
Anyone who has information on Robert Richard Fraser's whereabouts is asked to contact 020 8785 8244.
A murder investigation has been lauched in Wood Green.
43 year old Dora Matthews was found dead in her flat in Elizabeth Blackwell House, Wood Green on the morning of Thursday December 19th.
The cause of death has not yet been confirmed.
A 43 year old man attended Tottenham Police Station later that day where he was arrested on suspicion of murder. He was released on bail until February 2014.Anyone with information should contact police on 101 or Crimestoppers 0800 555 111.