HASTINGS, Minn. (AP) – A 60-year-old Minnesota man with 18 drunken-driving convictions will serve 20 months in prison for causing a crash that seriously injured two people in 2017. Marshall Knoll pleaded guilty to first-degree driving while impaired in exchange for the dismissal of more serious charges. The Star Tribune reports Sunday that Knoll received a 3-year prison sentence. But with credit for time served, what remains of his sentence is 20 months