When Napa Valley winemaker Jeffry Hill promised customers authentic terroir, he allegedly delivered something closer to highway robbery—substituting out-of-region grapes for premium Napa fruit in a $1.5 million scheme that now has him facing federal prison time. It's not the first time Hill has tangled with vineyard law, but with eight felony counts and two decades of potential sentence per charge, this vintage of trouble may finally prove undrinkable.