The former Tauranga man who killed and raped Auckland woman Blessie Gotingco has lost his last bid to overturn his convictions.

Tony Robertson was jailed for at least 24 years for running over the North Shore mother of three and then brutally murdering her in May 2014.

Following his conviction for murder, his past convictions for indecently assaulting a child in Tauranga were made public. Read more here.

The Court of Appeal refused to hear Robertson's case and in the latest legal chapter and the Supreme Court has also rejected his bid to quash the convictions.

He was pursuing the appeal on the basis that manslaughter should have been a verdict available to the jury.

In a decision released on Thursday, the court found there was no evidence for a manslaughter verdict.

The appeal was dismissed.

-RNZ.