I would just add one thing, which I meant to say and then overlooked, Mr. Chair. Just also bear in mind, as has been said before, that the registry is one tool for police in investigating crimes and presumably at some point in preventing them. Other tools remain at their disposal, and what occurred to us of course was the tool known by its acronym ViCLAS, the violent crime linkage analysis system. This is a system maintained by police in relation to high-end violent offences. Former police on the committee may correct me, but in that database one might well find information about MO or related issues.
Police investigating the disappearance of a young child can go to ViCLAS as well as to the national sex offender registry and can compare the information in both. So if there were a distinctive element in the disappearance that matched something in ViCLAS, that information—the person's name—could be compared against the sex offender registry to see if in fact that person lived in the area of the disappearance.