Reward over London charity worker's murder
Police have offered a £20,000 reward to help catch those responsible for the murder of a human rights worker in south-east London.
Abdel Salam Hassan Abdel Salam, 56, was found by neighbours at his home in Lee on 13 March. He had been stabbed in the leg and died of blood loss.
The victim volunteered at the Redress charity, a human rights organisation which supports survivors of torture.
Two men arrested in connection with the murder have been released on bail.
Det Ch Insp Damian Allain said: "Six months into this investigation and we still are unclear as to why Abdel Salam was murdered.
"We believe that the answer to this murder lies within the local community of Lewisham and we want to get people talking about this again.
"We continue to keep an open mind as to the motive but need people to come forward to assist with this investigation.
"This was a brutal attack on a defenceless man, made more tragic as Abdel Salam had devoted much of his life combating abuse of human rights upon others."
Det Ch Insp Allain said Abdel Salam was a large man who used two sticks to walk as he had some difficulty.
He would often travel by minicab or bus to the charity where he volunteered in central London.
An appeal has been made on Crimewatch.