Public prosecutors on Wednesday indicted four people on charges of fatally poisoning a man -- who was married to one of the four suspects -- with a dose of aconite in a murder-for-insurance scheme in Saitama Prefecture in 1995.

Prosecutors have charged Shigeru Yagi, 50, a moneylender from Honjo, Saitama Prefecture, local restaurant employees Mayumi Take, 33, and Takako Morita, 38, and snack bar hostess Analie Sato Kawamura, 35, with murdering 45-year-old Shuichi Sato.

It is alleged that the suspects conspired to murder Sato, then husband of Kawamura, by getting him to eat a Japanese sweet-bean bun spiked with 7 grams of aconite, a poisonous herb, at Sato's home in Honjo, Saitama Prefecture, on June 3, 1995.

The four are also suspected of abandoning his body in the Tone River shortly after the killing, although the three-year statute of limitations on the alleged dumping of the body has already passed.