 | On the eve of the start of the truffle season, some truffle dogs die of poisoning. Salvatore Folena, a truffle-hunter, is the main suspect, since |
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 | his dog was not poisoned. The man tells Don Matteo that his dog was still alive because he illegally went truffle hunting a day before the official opening of the truffle season. They discover a large quantity of poison at the vet breeder's. |  |
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