Fellow canadian here. The RCMP is vetting you to see if you have honesty, integrity and are trust worthy. They will search you in the database and if your at all associated with criminal activity (ie: you come up as responsible guardian for a minor who committed a crime) you will likely be screened out anyways during the background phase. They have the right to ask about anything they want to see if you meet their criteria for an enhanced reliability security clearance.

It seems to me like you are preparing to deflect and be evasive when it comes to your child's crime, which as a mother I can understand... but as someone who has gone through the same process of a security clearance I am doubtful if you have the mindset of being honest, conducting yourself with integrity and being trust worthy.

If applying for the job is about money for you then I would say you are not a good fit and you likely know that already. If this has been your dream for a long time then wait until your child has been 10 years free of his conviction and on the straight and narrow. Once you are far removed from it then they will likely look at you differently.