The 41-year-old died at the scene, about 20 kilometres south of Tulita. He suffered severe head and neck injuries.

Henderson leaves behind his wife, Agnes Grandejambe, and four young children.

According to Tulita RCMP Cpl. Don Halina, it's unclear if the bulldozer's lights were on.

"Our first indication was they were on. Now we're looking at the possibility they were not. It's not clear at the moment."

Halina said cold weather may have fogged the visor on Henderson's helmet.

Results of a blood test, due in two weeks, will determine if alcohol was a factor, said NWT chief coroner Percy Kinney.

Henderson was going on a hunting trip to Deline with his long-time friend Rex Powder, who was travelling behind him on a snowmobile.

Kinney said Powder was travelling quite a distance behind Henderson.

Grandejambe believes Powder may have seen the accident.

"From what everybody is saying, Rex is the only one that knows the truth," said Grandejambe.

The couple were planning to move from Yellowknife to Tulita, the community Henderson considered his home.

More than 10 years ago, Henderson moved North from Saskatchewan. He lived in Tulita and, more recently, Alberta and Yellowknife.

"He was so kind-hearted, always willing to help other people," said Grandejambe. "We were planning to move. He was already (in Tulita) making arrangements," she said.

Grandejambe works as a victim's services trainee at the NWT Native Women's Association in Yellowknife. Her colleagues helped get her to Tulita after the accident.

Since then, she's been staying with her best friend Cathie Menacho.

Menacho -- also a close friend of Henderson -- said many people in Tulita are grieving. A steady stream of people have visited the home to offer support.

"We've had a lot of visitors. It shows Chris had a lot of friends. He was part of the community."

A funeral will likely take place Thursday after Henderson's relatives arrive from Saskatchewan, she said.

This was the second snowmobile death in the NWT this year. A 39-year-old Lutsel K'e man died Jan. 5 when his snowmobile hit a rock. Ernie Joseph Michel was not wearing a helmet at the time of the crash.