Det Serg Martin Sutcliffe said the evidence found by Devon and Cornwall police painted a clear picture of the intentions of two men who conspired to kill and rob Joss Stone.
Both Kevin Liverpool and Junior Bradshaw were found guilty this afternoon.
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The newly re-elected Labour leader Jeremy Corbyn has pledged to re-build and increase the party's vote across the West Country.
A campaign is underway in Cornwall to save the post of a popular policeman - with an online petition gaining more than 6,000 signatures.
Mild but unsettled with rain at times