Per the BPS statement:
"Syringe Located in Treat Bag
On Monday evening at 8:30 pm, officers responded to a report of a syringe being located in a treat bag. A 13 year old and 15 year old girl stated they found an unused syringe in a treat bag after returning from trick or treating. The matter is still under investigation.
To clarify, the report of a syringe being located on Monday evening in a treat bag is a single incident reported to BPS. The information reported in the media does not match the actual complaint received, however the complaints are the same. At this time, there is only a single incident and the validity of that report is under investigation."
http://police.brandon.ca/media-zone