They didn't refuse to say it FGS.
A) they had to do their job and look after the victims, families, and make the scene(s) plural safe. They're a small community with a small emergency staff. Giving press updates to satisfy the slavering masses is not top of the priority list unless there is a present danger.
B) It was the early morning here when it started being reported in UK news. The town is several hours behind, meaning while everyone here was discussing it in the morning and lunchtime it was still the early hours there. The Canadian authorities are not going to hold a press conference at 3am to satisfy the curiosity of people in the UK.
C) The early reports did say a female in a dress. Likely coming from a witness who only got a glimpse because they were hiding or running. They didn't have time to stand there and properly appraise the situation.
D) Now we know the picture damn near everywhere is reporting it accurately.