July 23, 2025

Carter Capner Law monitors accidents involving cars, motorcycles, trucks, busses, cyclists and trams throughout Australia to spotlight safety issues of concern to our clients and to demonstrate those situations in which they may have a right to an insurance or compensation recovery. We act for drivers, riders, passengers, pedestrians. Call today on 1300 529 529 or click here to reach Carter Capner Law. Click on Client Showcase to view our history of road accident compensation claims.

Case Summary
Wayne Klingberg, 58, is currently on trial in the South Australian District Court over a fatal rollover crash that occurred on Owen Road near Hamley Bridge on 1 July 2022. The crash resulted in the death of his co-worker and passenger, 62-year-old Willyam Tiedemann. The prosecution alleges Klingberg was driving dangerously due to fatigue and prescription medication influence.

Key Details

  • Date of Incident: 1 July 2022
  • Location: Owen Road, near Hamley Bridge, SA
  • Vehicle: 2005 Hyundai Terracan
  • Casualty: Willyam Tiedemann, 62, died at the scene from head injuries

Court Proceedings

  • Defendant: Wayne Klingberg, 58
  • Charge: Causing death by dangerous driving
  • Court: South Australian District Court
  • Judge: Emily Telfer (trial by judge alone)

Dash Cam Evidence

  • Footage showed Mr Klingberg veering out of his lane 26 times in the 20 minutes leading up to the crash
  • First lane departure occurred less than 5 minutes into the journey
  • Prosecution described the driving as “grossly inattentive and ineffective”

Crash Details

  • Crash occurred on a 65 km/h advisory bend in a 100 km/h zone
  • Vehicle initially veered left onto gravel shoulder, then overcorrected twice
  • The vehicle rolled several times before coming to rest

Factors Under Consideration

  • Blood tests detected therapeutic levels of five prescription medications, including sedatives
  • Mr Klingberg was heard admitting fatigue and making concerning remarks like “watch the roadway” and “look where I’m driving”
  • He told Mr Tiedemann he’d stop in Balaklava for an energy drink

Expert Witnesses

  • Medical experts are expected to provide evidence on the effects of medications
  • Additional testimony will address whether Klingberg had any underlying medical issues contributing to the crash

Court Status
The trial is ongoing before Judge Emily Telfer. The court has not yet handed down a verdict.