Afterwards, Boyd allegedly told the girl not to tell anybody about what had happened.
The girl's school later heard of the allegations and police were informed.
On August 7, 2011 Boyd was arrested.
He appeared in court and was granted electronically-monitored bail, with conditions that he stayed at a home address at all times, except for approved absences, and to his surrender passport and not to apply for a new passport.
He was allowed to go shopping every Thursday with an approved support person.
In January 2013, he applied for an extension to his approved release so he could attend a doctor's appointment.
It was approved on the condition that Boyd, who got married in August 2012 and took his wife's surname, return to his house by 7pm on January 24.
However, he fled to Christchurch where he used a passport that he obtained under his adopted wife's surname to board a flight to Sydney - four days before his trial.
Boyd was arrested by Australian Federal Police in May 2013 and extradited to New Zealand in January last year.
Ms Hislop told the jury that Boyd's attempts to flee are an "important piece of evidence".
The defence's case is simply that none of the offending happened, defence counsel Marcus Zintl told the jury.
There were major issues of credibility and reliability, he claimed, as well as "lies and inconsistencies" in the evidence.
Mr Zintl reminded the jury that Boyd must be presumed innocent and it's up to the Crown to prove the charges beyond reasonable doubt.
The issue of Boyd skipping the country doesn't prove he committed the offences, Mr Zintl said.
There could be many reasons or explanations for people wanting to leave the country, he said, including being accused of a crime they didn't commit.
Mr Zintl closed his opening address by saying: "Please remember, there are two sides to every story."
The trial, before Judge Jane Farish, continues.
