Fatal victim Sean Cassidy posted a message of support to his mates a week before his death

THE popular Darwin man killed in a tragic road accident on Sunday morning posted a caring message of support for his mates just a week earlier.

Fatal victim Sean Cassidy and the crash scene on Sunday morning.

THE popular Darwin man killed in a tragic road accident on Sunday morning posted a caring message to show support for his mates just a week earlier.

Sean Cassidy posted to his Facebook page on October 31: “Phone is always on, door is open, fridge is full, and coffee can easily be brewed.”

“I’m doing a brother check in,” he wrote.

“Especially this time of year. Showing support for one another. I need Eight Men to post, not share, this message to show you are always there if someone needs to talk.”

Mr Cassidy was heavily involved in the local horse racing scene and was a part-owner in the Garry Lefoe-trained Mr Boomjangles.

The five-year-old gelding won his last race at Fannie Bay on October 17 for which he was on course to witness.

“Have a listen to the 1.25 mark... she’s no moonee valley on cox plate day, but I reckon 5 blokes erupted the grass straight,” Mr Cassidy wrote on his Facebook page.

“No one in the country has celebrated a benchmark 64 race like that!”

A GoFundMe page has been set up to help his family cover funeral costs.

Tributes have poured in for Mr Cassidy since his tragic death.

Renee Brant wrote: “Absolutely devastating ... RIP you were a real gentleman and a pleasure to meet.”

Jade Harrison said Mr Cassidy was one of her clients. “... condolences to his family ... lovely man,” she wrote.

Kerry Jenkins added: “Lots of love to his family and friends. A very lovable young man taken too soon.”

Elvin Manes wrote: “Condolences to his family. You should all be proud of the decent and gentle young man he was. Such a tragedy to lose him so young.”

“So sad, he was a lovely guy, condolences to his family,” Sarah Bate wrote on Facebook. Aaron Power wrote: “Rest easy mate.. you will be missed seano!!”

Mr Cassidy worked as an electrician for BSA.

NT Police Detective Senior Constable First Class Jeshua Kelly said police were investigating whether or not Mr Cassidy was wearing a seatbelt.

“Initial indicators are likely some sort of fatigue, inattention, intoxication,” he said.

The 30-year-old was behind the wheel of a white Toyota LandCruiser utility on Sunday when it rolled on Power Road, Girraween just after 2.30am.

The crash occurred 600m south of Girraween Road.

Police said his car had drifted to the right side of the road and struck the kerb and culvert.

Mr Cassidy was ejected from the car and tragically died at the scene.