Major Collision Investigation Unit detectives are investigating a quad-bike rollover in Healesville on 19 January.
It is believed a quad-bike, with two occupants, crashed on a private property on Healesville Kooweerup Road about 2pm.
The driver, a seven-year-old boy from Healesville, was uninjured.
The passenger, a seven-year-old boy also from Healesville was airlifted to hospital with life-threatening injuries.
Local CFA and SES units attended the scene.
According to Victoria Police, an investigation into the incident is ongoing.














