A maniac is on the loose after he gunned down two people with an AR-15 in the middle of Houston rush-hour traffic — and then bolted in his car, with a trash bag full of weed inside, according to a new report. The chaos unfolded just before 6 p.m. Thursday on eastbound Interstate 10, when the shooter and another person in his sedan struck another vehicle, causing it to spin out, local outlet ABC 13 reported. Both suspects got out of the car — and one of them opened fire, according to the report. “A Hispanic male, tan shirt, holding...