The full truth is never going to come out as it would result in half the cast going to prison. (Ian, Jane, Bobby, Peter, Lauren, Cindy, Liam, Phil, Sharon, Kathy I have probably forgotten a few more). The only way I can see this ending is if Jane goes to the police and takes full responsibility denying that Ian or anyone else knew anything about it. It would be a shame to lose Jane as she is an interesting character, Laurie Brett one of the shows finest actors and Ian and Jane make a brilliant partnership Ian wont be the same without her. However the writers really have backed themselves into a corner with this storyline there is no other conclusion.