- 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 force has been tweeting after carrying out a series of dawn raids.
Adenike Akingbogun made the dangerous manoeuvre after ignoring the crossing lights and driving onto the tracks.
Police arrived at the 73-year-old's home after Alfie chased a delivery man.