"I had hoped" said Sir Ian Blair, in his most sombre of tones "that we would have passed a month without another murder. But it was not to be."
Standing side by side, with their eyes fixed firmly in the middle distance, the new Mayor and the old Commissioner talked gravely about the latest in a string of teenage deaths pulling through the capital.
"I spoke to a mother recently who had bought her son a coffin for his birthday," said Sir Ian to an increasingly grim-faced crowd of hacks. "That is what we are dealing with."
For any Mayor, the murder of a teenager is a solemn event. The friends, family and community of those affected will look to their Mayor for condolence, for answers and for action.
But for Boris, the problem of rising teen violence is one that he has made himself both personally and politically responsible for.
And by making teen and gang violence such a central part of his campaign, he has given himself both a mandate and an obligation to overcome it.
Living by the knife
Because during the election campaign, the rising level of teen violence was a clear force behind both the dissatisfaction with Livingstone and the optimism around Johnson.
Boris's team printed leaflets featuring witness appeal boards, and their candidate spoke often of blood staining the streets and of schoolrooms where every child had been mugged.
And as Livingstone fell back on his record of increasing police numbers and of decreasing murder rates, Boris's team fell on his words as evidence of a man who no longer had any fresh answers.
And at today's press conference, London's press were looking for those same answers.
Asked by Dave Hill of the Guardian, what he would do to solve the causes of this violence he replied that he had no 'messianic' answer but that he would work his hardest to begin the fight.
"We can't suture together the rent fabric of society," he said to sound of lowered expectations, "But we know we can make a difference and we can articulate the problem and articulate the solutions."
But as the deaths continue to rise, and as protesters continue to vent their feelings outside his Islington front door, it will remain to be seen whether he can do enough to 'suture the fabric' of what will surely become his defining cause.