Police did not reveal whether Olugun admits to the allegations
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News from Saitama
Kazumasa Iwabuchi is believed to have died one month before the discovery
police found a notebook kept by the suspect that included a plot for the murder of the woman and her family
Police are now seeking to confirm the identity of the body
According to police, the suspect met the girl via a social-networking service
Suspect said, 'I got angry after not being to buy masks'
Suspect admitted to assaulting the victim, police said
Suspect and his wife were living apart, police said
Woman said, 'I was under stress since my husband did not provide help at home'
One perpetrator wielded a knife inside an outlet of Lawson in Moroyama early Wednesday