Scotland Yard investigating the murder of Dr Imran Farooq in London are appealing for anyone with information to come forward four years on.
Dr Farooq was on his way home from work when he was attacked outside his home in Green Lane, Edgware, London, shortly before 17:30hrs on Thursday 16 September 2010.
Dr Farooq, 50, died as a result of multiple stab wounds and blunt trauma to the head. A five and a half inch-bladed kitchen knife and a house brick used in the attack were recovered at the scene.
Detectives from the Met Police Counter Terrorism Command (SO15) who are investigating his murder are committed to finding those responsible. To date they have spoken to 4466 people, reviewed 7401 documents and followed up 2379 lines of inquiry and seized 3900 exhibits in order to bring his killers to justice.
This remains an ongoing investigation and we continue to liaise closely with the authorities from Pakistan. A number of lines of inquiry are being actively pursued It is thought that his murder would have required careful planning and help from other people, some of whom may have provided assistance or information unwittingly.
Detectives believe that Dr Farooq was about to launch a new independent political career before his death and this remains a key line of inquiry in this investigation.
Police know that in July 2010, Dr Farooq set up a Facebook profile and amassed a large number of contacts through this social network.
To date a total of 2 people have been arrested in connection with this investigation.