- 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
More top news
A woman died as she crossed the road when she was struck by four separate motorists who police believe did not stop.
Patrols including local volunteers have been set up after the grisly finds in Thamesmead in the last month.
Thieves targeted a property in Richmond on Monday afternoon.