Takaoka wrote on her telephone before the incident, 'I know killing him is for the best'
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Suspects also accused of stealing victim's mobile telephone
Suspect reportedly threatened, 'Don't make a sound or I'll kill you'
Suspect told police that he 'does not recall' the matter
Upon his arrest, the suspect told police that he intended to kill the victim
Suspect, who pointed a handgun at arresting officers, said: 'I fired about 30 rounds'
Man suffered wound to throat
Suspects also repeatedly beat the victim inside his own vehicle
Suspect claimed the acts 'were consensual' upon his arrest earlier this month
Suspect denies the allegations, telling police that he 'does not recall' the matter