Alfreda Nelson received a 15-year state prison sentence for a hit-and-run crash that seriously injured 9-year-old Sawyer Crawley last January.WATCH FULL REPORT BELOW: Driver receives 15-year prison sentence for hit-and-run crash that injured 9-year-old Sawyer Crawley2nd Circuit Judge Brian D. Miller handed down the maximum sentence during Thursday's hearing. Nelson was charged with one count of leaving the scene of a crash involving serious bodi…