https://abc13.com/what-was-found-in-home-after-deadly-drug-raid-hpd-warrant/5127653/
https://assets.documentcloud.org/documents/5733178/Harding-St-Search-Warrant-Return.pdf
In reading one of the articles you linked to, I would question this...
The informant went to the house and came out with a brown substance that the officer immediately identified as heroin.
During the raid, the cops found a small amount of white powder, and have yet to identify it.
Why is that ?