Mexico murders: Callum Robinson's girlfriend Emily Horwath shares pictures of their final trip to Perth

The grieving girlfriend of Callum Robinson has shared pictures of their final adventure-filled trip to Perth together before he was brutally murdered on a surfing trip in Mexico.

Emily Horwath was dating 33-year-old Callum before he was shot with his brother Jake and friend Jack Carter Rhoad during a bungled robbery in the Mexican state of Baja California.

Ms Horwath lives in the US, where Callum had moved from Perth, and shared footage and pictures from an adventure-filled trip to Western Australia last Christmas.

The pictures showed the pair at the Australia v Pakistan Test match, zip-lining off the Matagarup Bridge and larking about on Rottnest Island.

“For Christmas he gifted me a bridge climb and zip line knowing my fear of heights he always tried to push me outside of my comfort to enjoy things I would never do on my own.

Ms Horwath showed the pair down the South West’s caves and in front of a small plane, preparing for a scenic flight over Perth.

Alongside a picture of the pair embracing, she wrote how Callum had “changed my life in ways that I can’t even put into words”.

“I don’t yet understand a world without his energy in it.

“I feel so grateful to have loved him. Tell your people you love them. Live life to the fullest every day, be kind to others, laugh uncontrollably, don’t let the small stuff bother you, lead with positivity and live like Cal,” she wrote.

Text messages sent in January addressing the death of Callum’s nan show his strong affinity with the ocean, which would see him head to Mexico on the fateful surfing trip just months later.

“When someone passes I always think they speak through the sky. I woke up this morning and it was bright red, beautiful. Just thought of you and your nan this morning,” Ms Horwath wrote to Callum.

“Thanks Babi... you’re filling my heart up in all the right ways,” he replied.

“I’m also a big believer in the ocean and the sky being a conduit between the physical state and spiritual state. I’m going to be doing a lot of looking up today.”

Callum, 30-year-old Jake and Mr Rhoad, 30, were shot in an apparent car-jacking attempt. Their bodies were discovered dumped down a well.

Three Mexican nationals — Jesus Gerardo Garica Cota, also known as El Kekas, his 23-year-o

ld partner Ari Gisel Garcia Cota and Kekas’ brother Cristian Alejandro Garcia — have been arrested over the murders.

Jesus Gerardo Garcia faces a “forced disappearance” charge and is set to face court on Thursday. It is reported his charge will be upgraded to murder during his first appearance.

Mexican authorities have not ruled out further arrests in relation to the deaths.