Ben Hope and Jason Richards, the killers of Cardiff A-Level student Aamir Siddiqi, have each received a life sentence in jail.
The judge at Swansea Crown Court told them they must each serve a minimum term of 40 years.
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A major crime review team raised concerns around the initial investigation, and the document was "a trigger" for the Surrey Police probe.
Five incidents, involving a man and a vehicle, have all taken place since January 26.
We've found some lovely archive footage of a pancake-making machine...