Michael Harris -- the new mayor of a small Louisiana city -- tells TMZ his predecessor, Misty Roberts , shocked the population when allegations of her having sex with a teenage boy at a drunken pool party broke. According to Harris ... his prior impression of Misty is that she was a good wife, mother and person ... but that image was completely shattered by her arrest and subsequent conviction for having carnal knowledge of a juvenile -- a term often used interchangeably with statutory rape. He