Tommy Lawrence, 28, was attending the after-wedding party of his sister Sharon, at the Glyn Arms in Hackney, on 27 Oct 2011. A fight broke out between Tommy and Martin Ward, and Tommy was ushered outside, where he was stabbed four times with a carving knife. One of these slashed his aorta, causing death due to loss of blood.
Police investigating an incident report found Lawrence outside the pub at 11:50pm. Next day DCI Nicola Wall and a police team from Barking arrested three men, but they were subsequently released without charge.
Martin Ward was tracked down by officers in Wales, and arrested on 29 Oct 2011.
After a first trial in which the jury could not reach a verdict, Ward was found guilty of murder in May 2013, and he was sentenced to 23 years in jail.
Ward’s DNA had been found on the murder weapon.
Mark Morrison, 46, was found in the early hours of 21 June 2012, under Marble Arch. He had been strangled.
DCI Nicola Wall headed the investigation and appealed for witnesses.
Mr Morrison was originally from Scotland and had been sleeping rough in London. He was said to have been a polite man who did not behave anti-socially and had chosen to sleep rough.
On 30 June 2012, Ghodratollah Barani, 26, was charged with murder. He was due to stand trial at the Old Bailey, but he pleaded guilty to manslaughter on the ground of diminished responsibility, 1 Mar 2013.
He had repeatedly turned up at Buckingham Palace, demanding to see the Queen, and claiming to be the King of England or the King of Afghanistan. He claimed voices had told him to kill someone in order to become King of England.
At around 3am on June 21 Barani had been seen stooping over Mr Morrison by an engineer working at Marble Arch tube station but he ran off after being challenged.
Barani was detained indefinitely under the Mental Health Act.
Margaret Muller, 27, was stabbed to death in Victoria Park in East London, on 3 Feb 2003. Despite repeated police appeals and national publicity, her murder has not been solved.
Margaret was found slumped on a path by members of the public, who heard her screams at 8:30am. She lived nearby and had been out for her usual early morning jog.
A month after the killing, officers staged Scotland Yard’s largest reconstruction, asking more than 100 witnesses to retrace their movements in the park. And within months, officers carried out more than 1,000 house-to-house inquires and took more than 1,000 witness statements.
In Feb 2011, DCI Nicola Wall was leading the investigation by the Met’s Homicide and Serious Crime Command.
Police said “Whilst detectives retain an open mind about the possible motive of the attack, new intelligence suggests that Margaret could have been the victim of a failed robbery attempt.”
Detectives are appealing for information about a person seen entering the park via the Queen’s Gate entrance at around 7:10am.
Witnesses also saw someone sprint out of the same gate shortly after the murder, heading towards Gascoyne Estate.
DCI Wall described the case review. “Officers have worked tirelessly on this case and have managed to sift through literally hundreds of pieces of information and leads. Despite the tremendous support from the local community we know that some people still hold vital information about Margaret’s murder.”
By 2011, a total of 9 suspects had been arrested, but no-one had been charged with the crime.
In Jan 2012, police published a list of 290 unsolved murders in Greater London since 1999, and said that each of these was reviewed once every two years.