BOISE -- Authorities say alcohol was a factor in the deadly crash that killed a 50-year-old Boise man Sunday.
Officers with the Idaho State Police say 50-year-old Roger Brown went off Bogus Basin Road near milepost 11 sometime around 2 p.m.
Brown s crumpled, 1979 Porsche 930 was found 400 feet down an embankment. He was pronounced dead on the scene.
While alcohol is said to be a factor in the crash, ISP wouldn't say exactly why. The agency is expected to release more specific details Tuesday.
A technical rescue crew from Boise Fire Department was on hand to help recover Brown's body.
You know anytime you have that elevation change and a steep slope at that - a steep slippery slope at that - it makes for a really tricky rescue, said Boise Fire Battalion Chief Jake Ellis.
At this point, Idaho State Police aren't saying what caused Brown to go over the side of the road.
Although police have not said if weather is a factor, with recent snow in the mountains, Ellis said drivers should use caution.
I think it still can be tricky especially if you are not paying absolute attention as to what the road is doing and at a slow careful speed, said Ellis.
Traffic was reduced to one lane while crews worked to clear the scene of the crash.
The crash remains under investigation by the Idaho State Police.