KANSAS CITY, Miss.—A Missouri man who has insisted for more than 20 years that he was wrongly convicted as a teenager of killing his mother has been granted parole. Attorneys for 37-year-old Michael Politte confirmed Tuesday that he had been given parole, the Kansas City Star reported. He is set to be released on April 23 from the Jefferson City Correctional Center. Politte was 14 years old in 1998 when, according to his lawyers, he found the burning body of his mother, Rita Politte, on the floor of their home in the eastern Missouri town of Hopewell as he and a friend, who said they awoke to smoke, scrambled to escape. Investigators said the fire was started with gasoline and determined that Rita Politte had also suffered blunt force head trauma. The investigation focused on her teenage son as the main suspect and four years later, he was convicted as …