Besides involvement in Tokyo subway sarin gas attack and LSD drug affair, Hayashi was convicted in a number of other crimes. For example, he assisted in kidnapping of Kiyoshi Kariya, the 68-year-old brother of a 62-year-old woman who planned to become a renunciate but went missing (Hayashi believed she was held against her will by her brother to prevent her from becoming a nun). Hayashi and several other men injected Kariya with a drug to find the woman, but Kariya unexpectedly died, either from miscalculated dosage or weak physical health. Previously Hayashi helped another Aum member to recover from a forced drug treatment administered by the follower's father (also to prevent him from becoming a renunciate).