Somebody who was in charge of rounding up donations for a Goodwill store in Washington state is kicking themselves right now.

Television station Q13 reports that Goodwill workers in Monroe, Wash. were surprised to open a donated cooler last week and find almost four pounds of marijuana inside.

Police were called to come pick up the stash, which they estimated had a street value of $24,000. They were reviewing surveillance footage to see if they could figure out who had dropped off the cooler.

It wasn’t clear what would happen if they found them; recreational marijuana use and sale has been legal in Washington state since 2014.