Six people arrested in what Police call the biggest heroin bust ever in Huntingdon County.  Now the charges against one of those people will go to trial.  Curtis Koehler is accused of being the ringleader of a massive heroin operation.  Police say he was bringing in as much as 90 thousand dollars a week.  Koehler waived his rights to a preliminary hearing this week and remains in jail on 800 thousand dollars bail.