Ami Nakagomi was found dead in a bamboo thicket on May 12
TokyoReporter
Burned charcoal briquettes were also found inside
Man was hanged by rope from ceiling; girl friend strangled
Couple’s two children also arrested
Suspect denies the allegations: 'I went to the parlor, but I didn't do it'
Perpetrator said during the standoff: 'Back off, or I'm going to die together with this woman'
National Tax Agency said: 'We will continue to pursue criminal liability for malicious persons who attempt to evade taxes'
Mayuko Inada was found dead inside her karaoke parlor on June 14
Contraband had a street value of around 960 million yen
A neighbor tipped off police on June 10