A man has been charged with the murder of Mohamed Al-Zufairi opposite a police station in Wealdstone.
Femi Omotoso, 26, of Tudor Gardens, Wealdstone was charged today (March 5), with his murder on February 27 in High Street, Wealdstone.
A post-mortem examination at Northwick Park Hospital on Wednesday (March 1) gave cause of death as a single stab wound to the heart.
Omotoso will appear in custody at a London magistrates' court on Monday (March 6).
A Metropolitan Police spokesman said: "Officers will be in the area of Wealdstone High Street on the evening on Monday in order to identify and speak with any outstanding witnesses."
Any witnesses or anyone with information is urged to call the incident room on 020 8358 0200, or contact police on 101 or by tweeting @MetCC.
'Devastating incidents seem to be happening more and more'
Emergency services were called to the Halifax bank opposite the recently closed down police station at around 6.50pm.
The victim was rushed to hospital in a critical condition but died at around 2.30am on Tuesday morning (February 28).
The London Assembly member for Brent and Harrow has recently voiced his concerns over knife crime in the capital and said she will be taking up the issue with the Mayor of London, Sadiq Khan.
In a letter to getwestlondon , Labour's Navin Shah said : "I was deeply saddened to hear that we have lost yet another life.
"It deeply concerns me that these devastating incidents seem to be happening more and more."
To give information anonymously contact Crimestoppers on 0800 555 111 or visit the crimestoppers-uk.org website.
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