A Mexican woman has been sentenced to 20 years in prison for her involvement in the tragic deaths of Australian siblings Jake and Callum Robinson, along with their American companion, in northern Mexico.

The Robinson brothers, accompanied by their friend Jack Carter Rhoad, were enjoying a surfing adventure last April in Baja California, near the city of Ensenada, when they were tragically shot and killed.

During the trial, it was revealed that Ari Gisell had a motive to obtain the tires from the tourists’ vehicle. She allegedly directed her then-boyfriend, Jesús Gerardo, to “get me a good phone and good tires for my pickup truck.”

In accordance with Mexican judicial practices, last names were not disclosed during the trial proceedings.

Jesús Gerardo, along with accomplices Irineo Francisco and Ángel Jesús, located the tourists’ vehicle at their campsite, where they proceeded to rob and subsequently murder them.

The legal proceedings against these three men are still ongoing in court.

The parents of the Robinson brothers gave emotional statements via video link, the ABC reports.

“We dreamed of seeing them grow older, of having children. That’s all taken now,” said their mother Debra Robinson.

“We live with their absence.”

A tearful Ari Gisel apologised in court, saying “nothing I can say will compensate you or give you peace”.

The killings of the Robinson brothers, who grew up in Perth, shocked Australia.

Months after the deaths, the brothers’ parents Debra and Martin Robinson set up a non-profit charity in their sons’ names aimed at helping young people make positive changes in their lives.