This episode is part of the arc.
The detectives, including Conan and Heiji Hattori (Harley Hartwell), use this paper to verify Hideomi's involvement in the ongoing murders at the Nagato estate. Detective Conan (Dub) Episode 77
You can watch this episode on streaming platforms like Crunchyroll or Tubi . Distinguished Family's Consecutive Accidental Death Case This episode is part of the arc
Richard Moore (Kogoro Mouri) is hired by the patriarch of the Nagato family to find his first love, but the investigation quickly turns into a murder mystery when a family member is found dead. Detective Conan (Dub) Episode 77