Southbury Police have charged three people for a vandalism incident at Pomperaug High School.  The Republican American newspaper reports that the three 18 year olds turned themselves in for allegedly spray-painting vulgar graffiti around the school campus in August.  Ryan Canty and Jon Catan, both of Southbury, were each charged with criminal mischief, criminal trespassing and conspiracy.  Jonathan Tapia of Middlebury was charged with criminal trespassing and conspiracy.  The actions were caught on surveillance cameras.  Southbury Police say at least two of the former Pomperaug students were away at college and were charged when they cam home for break.  The vulgar words and objects were spray painted on the bathroom walls near the football field, in the baseball dugouts and on the walkway from the school to the stadium.