Police are investigating whether the suspect was using drugs while at work for METI
TokyoReporter
Woman said over the telephone, 'I planted a bomb on the viewing platform'
Suspect is from Osaka Prefecture, police said
Suspect told police, 'Since I didn't have a license, I fled'
Suspect believed to have recruited members to join fraud ring
Suspect told police, 'I am dissatisfied with the imperial system'
No reason for the non-prosecution was given
Doctor once praised the Nazis on Twitter
Suspect has remained silent, police said
Suspects met the victim on a matchmaking site