POLK COUNTY, Fla. (WWSB) – On Wednesday, opening statements were held in the trial of the Polk County teen accused of murdering his mother. Collin Griffith, 17, is accused of murdering his mother, 39-year-old Catherine Griffith. According to authorities, this happened just a year after he shot his father to death in Oklahoma, claiming self-defense. Charges against Griffith in that case were dropped…