If you loved Case Closed: Countdown to Heaven, try Detective Conan: Captured in Her Eyes
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
You already loved

Case Closed: Countdown to Heaven
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Detective Conan: Captured in Her Eyes
What they share
Both films are directed by Kenji Kodama, and they both carry the foreign gem mood tag, and they sit in Animation / Crime / Mystery territory. If that's the register that drew you to Case Closed: Countdown to Heaven, the second film will land in a comparable space — through a different lens.
foreign gem
What Detective Conan: Captured in Her Eyes is
Tokyo autumn. A single revolver click in the rain. A gunman’s silhouette behind a police officer, Ran’s scream echoing off wet pavement. Conan decodes clues as Ran’s memories slip like rain through fingers.