4 Shimai Tantei Dan

4 Shimai Tantei Dan (Japanese title ４姉妹探偵団) was a 2008 Japanese detective series that aired on the TV Asahi network. It features a team of four sleuthing sisters.

Murder by hypnosis!? The sisters who kill themselves - (Episode 5)
As part of his revenge a man hypnotizes a psychologist that witness the hypnotist killing the mother of the sleuthing sisters, and made she thinks that the uncle of the sister is the murder. In addition he hypnotizes the four sister to kill each other.