London murders leave UK asking if social media is to blame

A family friend looks a message left at a temporary memorial, set up at a spot near to where 18 year old Israel Ogunsola was stabbed to death on Wednesday April 4, in central Hackney, north London on April 6, 2018. Another deadly night in London is putting pressure on political leaders, as a surge in violence on the streets of the British capital pushes its murder rate higher than New York's. / AFP PHOTO / Daniel LEAL-OLIVAS

The rows of flowers and candles grieving the stabbing of teenager Israel Ogunsola in the east London neighbourhood of Hackney lie four deep in a narrow alley. 

It’s one of a growing number of memorials to murder victims in the capital from the last few weeks. A 25-minute drive north takes you to the spot where 17-year-old Tanesha Melbourne-Blake died in an unrelated shooting, just two days earlier.