This is pretty strange.

Before Pesach we heard about how Rav Zilbershtein paskened regarding the status of medical marijuana for Pesach, and he brought the bundle of marijuana leaves to Rav Kanievsky to talk about it, and to make the bracha on smelling the fragrance of the leaves.

Some Haredi fellow has filed a complaint with the police against Rav Kanievsky and Rav Zilbershtein for using marijuana. I don't know if he also filed against Rav Zilbershtein.
source: Kooker

can you imagine them being arrested and put in the slammer for this? Obviously they were not smoking it or baking it into brownies, but were analyzing it for religious research purposes, and that should not be an offense.

I do wonder though who brought it to them and where he got it from. Maybe it was one of the licensed and authorized growers, but if not maybe that person should be investigated...

Also, as per the video below, Rav Kanievsky himself seems to never have handled the marijuana, so I think the filing of charges against him are probably misplaced. I wonder if sniffing those leaves the way he did is enough to be considered having broken the law.

and video of the original discussion and blessing has been publicized..