(Decanter) - Charles Banks, prolific winery investor and partial owner of Napa Valley’s Mayacamas Vineyards, has indicated that he will plead guilty to one count of federal wire fraud, raising more doubts about his ability to maintain his current involvement in wine.

It emerged last week that Charles Banks has decided to plead guilty to one count of wire fraud in a case to be heard in San Antonio, Texas, which carries a maximum prison sentence of 20 years. The case was set to be heard on 27 June, reported Napa Valley Register.

Banks was indicted in San Antonio on two counts of fraud in September 2016, after retired San Antonio Spur Tim Duncan claimed that Banks, his longtime financial adviser, had persuaded him to invest over $13 million in Gameday Entertainment, a sport merchandise company partially owned by Banks. Duncan said that he had yet to see any return on his investment.