While Takasō was being questioned at the police department, he reportedly told the police he and Sakai were involved in drugs. As early as ten days prior to his arrest, the two of them used drugs while on a family trip to Amami Ōshima in Kagoshima Prefecture. At the time of Takasō's arrest, Sakai was living in her own apartment in Tokyo. While Sakai was away, the police searched Sakai's home, and reportedly found 0.008 grams of stimulant drugs, carefully wrapped in aluminum foil. An inhaler among the drugs was discovered to have Sakai's DNA. As a result, a warrant was issued for her arrest. On August 5, 2009, Sakai dropped her son off with an unnamed friend, purchased some underwear and other necessities from a store, and then disappeared.