Kumar had relatively minor previous convictions for driving offences.
Lakshman told Judge Ian Mill earlier cases defined vulnerability differently, to include elderly or vision-impaired victims.
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But police had texts the pair exchanged, including a rape accusation and another in which the complainant asked what happened that night.
Kumar earlier told the court he was active in voluntary work among the Fiji-Indian expatriate community.
POLICE REASSURANCEOfficer in charge of the investigation Detective Lesa Eastergaard said she was "very proud" of the victim for coming forward and was pleased with the sentence."If anyone is hesitant about coming forward to Police, I would like to reassure you that Police do take these complaints very seriously.