Since 2019, the syndicate is believed to have processed a staggering 340 billion yen in illegal gambling funds
TokyoReporter
Osaka police stated, 'We believe the criteria for firing were met'
Police believe suspect was behind string of similar vandalism in surrounding area on same day
Mastermind remains at large
Police will now continue their investigation into the incident on a voluntary basis
Yu Tano wrote on X, 'I wanted to help even a little'
Homeowner said, 'I just want them to stop'
Suspect said, 'I did not use violence'
Suspect said, 'I wanted to relieve stress'
Whistleblower resigned earlier this year after his health deteriorated from the stress