PONTIAC, Mich. — The parents of the teenager charged in the Oxford High School mass shooting will each have independent attorneys appointed to help make sure that having attorneys from the same law firm does not provide a potential appeal if they are convicted. Jennifer and James Crumbley are currently represented, respectively, by Shannon Smith and Mariell Lehman, who both work in the same law office and took turns at district court hearings questioning witnesses on behalf of their clients. The Oakland County Prosecutor’s Office said while the parents have said they had no problems with the a…