In this scene- The Detective Boys visited Lupin and his associate’s hideout by not informing Conan and Haibara. In hopes to catch them by giving them drugged cookies, they themselves fell asleep after drinking the tea Goemon served them.
Sauce: Lupin III vs Detective Conan: The Movie (English Dub released in 2021)
The English dubs of the previous newly released movies is being done by Bang Zoom! Entertainment and I recommend you to check them out too. If you are living in the US or Canada you can possibly find some Case Closed movies on Amazon Prime Video as well.
Discotek Media also releases physical copies of the dub so depending on your region you can buy them as well.
Video made on subscribers’ demand
MAG.MOE - The MAG, The MOE.