Police are appealing for any dashcam footage of the moments leading up to a serious motorcycle crash near Imbil.
A rider suffered critical injuries after coming off his 2008 Harley Davidson, while travelling westbound along Yabba Creek Road toward Borumba Dam, around 10pm on Friday.
A passing motorist stopped to help the rider and raised the alarm.
The 48-year-old Mount Archer man was later airlifted to the Royal Brisbane and Woman’s Hospital in a critical condition.
Forensic Crash Unit investigators are appealing for witnesses, especially those with dashcam vision of the crash, or the moments leading up to it, to come forward.