Nine years after Florida State University law professor Dan Markel was fatally gunned down in his driveway in broad daylight, the man accused of masterminding the plot is about to stand trial. Broward County periodontist Charlie Adelson, who prosecutors claim paid Sigfredo Garcia and Luis Rivera $100,000 to kill his former brother-in-law, is facing charges of first-degree murder, conspiracy to commit murder, and solicitation to commit murder…