What happened
The flight was proceeding toward the destination airport under visual meteorological conditions. As the aircraft neared the airfield, the pilot assessed the local wind conditions and determined that the wind was calm. The pilot executed a standard approach and touchdown on the runway.
During the rollout phase immediately after landing, the pilot lost directional control of the airplane. The aircraft departed the paved surface, veering off the runway into an adjacent soft dirt field. Upon impact with the uneven terrain, the nose gear collapsed, causing the aircraft to nosed over.
A flight instructor who witnessed the accident reported observing a dust devil in the vicinity of the runway at the time of the incident. This atmospheric phenomenon may have contributed to the sudden loss of control during the critical rollout phase.