How did Nova Scotia guman come to have authentic police items?

It seems to have been pretty common knowledge around both Dartmouth and Portapique, Nova Scotia, that multiple murderer, Gabriel Wortman, had at least one almost perfect replica police car (the 51-year old denturist split his time between the two places, and owned "properties" in Portapique, where the rampage stsrted). Indeed, he seems to have shared the fact quite openly with acquaintances, and even with local police officers. Certainly, the guy who sold him the car and those responsible for adding the inch-perfect custom-made decals and paintwork were well aware of it, and it was apparently parked outside his home as a "deterrent to thieves" for some time before the tragic events of this last week.
How did somebody not find this suspicious? How did the police not jump on it (it is, after all, illegal)? This is not innocent, well-adjusted behaviour.
Ditto with a regulation police uniform - how and why is it possible to buy an authentic police uniform (not even a close replica, but a REAL uniform), given that impersonating a police officer is a crime punishable by up to five years in prison? Again, plenty of locals were quite well aware of Wortman's kinky predilections in that regard. And to argue that owning the uniform is not in itself a crime, only making use of it for nefarious reasons, is in my humble view no argument at all, and neither is the argument that there are legitimate reasons why a person might have such a uniform (e.g. for TV, movies, collectors). Where does one buy such an item, and why is anyone legally allowed to sell them?
It seems to me that, rather than fixating on why the RCMP didn't issue an amber cellphone alert, the local people (and police) should be asking themselves a few hard questions.