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.
More top news
Your latest West Country weather forecast with Bob Crampton.
A coroner has ruled a "series of failures" contributed to the death of a newborn.
Cornish charity ShelterBox has flown volunteers to the Turkey-Syria border to help deal with growing number of refugees there.