When a source is 'official' that is considered checking probably. Having to double-check every official statement may be good skepticism but would add so much extra work as to be impractical.CBC was fed a pack of nonsense by multiple officials and ran the story unchecked - the State of Play, so ...
Why did CBC not check the claims for themselves?
It could have been a case of misunderstanding anywhere along the information chain, either on the news end or on the official's end - 'the place where the shooter was shot' becoming 'here are the bullet holes from the shooter being shot' being a fairly easy jump to make for anyone not totally familiar with all the facts.Which officials gave false information to the press? Why did CBC not check the claims for themselves? How could multiple officials all come to tell the same false story to the media absent collusion and an intention to mislead? W