- The teenager was been arrested in London and taken to Luton by police
- Three men, described by police as black and in their twenties, are believed to have forced their way into Tony Abrahams' home at about 3am on Saturday
- The victim's wife and daughter called police after finding Mr Abrahams injured
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The 20-year-old was found fatally wounded on Roth Walk, near Finsbury Park, north London at around 3am on Saturday, Scotland Yard said.
Police have arrested a man wanted in connection with a burglary at the home of pensioner Richard Osborn-Brooks.
The rally comes after it emerged that the Home Office destroyed thousands of landing cards documenting the arrival of windrush-era migrants