Sure interpol, could probably still track him after the name change. But he could move in next door to you, and you would not have a clue who he was.Aren‘t name changes part of the public record? Whatever he called himself, he’d have a hard time concealing his identity for long anywhere in RoI. Anyway, if we choose to have a system that lets such people out, we rather than foreigners should live with the consequences.
Indeed, the police have a policy of not telling people when a sex offender moves into their area. The public are not given access to the list of registered sex offenders.