Cause of death was death by fire, police said
TokyoReporter
Suspect met the girl via Twitter
Suspect said, 'I killed my husband after holding a grudge for many years'
Suspect told police, 'I didn't do it'
Incident took place as the suspect was commuting to work in December
Police launched an investigation after receiving a report on the matter on February 26
Suspect called out to her, 'Let's have a good time'
Police believe that the incident involved around 10 people and up to five vehicles
Members of the ring are believed to have traveled to the capital to broker deals
Suspect said, 'I used up my money'