The Unfriendly Girls Band (1) Meitantei Conan : Season 1 Episode 836

Conan, Sonoko, Ran, and two friends decide to go to a recording studio to record some songs. They meet the members of a girl's band, who are arguing about their upcoming performance. The drummer is later found strangled in the studio. Three of her band members are suspected of killing her, but when the police cannot find the string used to kill her, the investigation encounters some trouble.