One of two adult men who have been charged with murder and other crimes for opening fire at the Kansas City Chiefs Super Bowl parade last week told police his actions were “stupid,” according to a charging document. Lyndell Mays and Dominic Miller were both charged this week with second-degree murder, two counts of armed criminal action and one count of unlawful use of a weapon, KSHB-TV reported Tuesday afternoon. Their identities had been withheld, and both men were shot when a shootout occurred on Feb. 14 in Kansas City as many in the city celebrated winning a second consecutive Super Bowl t…