knife crime
The Met Police have released an urgent appeal for information.
Another teenager is believed to also have been attacked.
Victim was knifed in the back and in the leg in what was thought to be a robbery.
Christopher Nicol was attacked in his home in Inverclyde last month.
“I was hoping it was mistaken identity – there was no way it was going to be Tashan."
Osvaldo Carvalho, 22, died after being attacked on Tuesday.
Police have urged anyone with information to get in touch.
The victim, believed to be aged in his early 20s, died at the scene.
A 15-year-old was killed on Saturday night.
A 15-year-old boy was stabbed to death in a separate incident in Slough just hours later.