This paper presents a case study of a deadly run-over accident, in whose investigation an analysis of the vehicle's electronic control units (ECUs) was requested in order to determine its speed in the accident. The authors used vehicular diagnostic equipment commonly available in workshops to find out the aforementioned speed using its ECUs' fault record, subsequently confirming and supplementing the conclusions from the scene's and security camera's forensics reports. The paper presents the methodology used in the exam - which does not depend on deflated airbags, availability of CDRs (Crash Data Retrieval) or any specific forensics tool - along with a short theoretical introduction, so that the reader can replicate the applied techniques in similar cases.
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