BANGKOK, THAILAND – A Thai court rejected a key police forensic report in a high-profile crash case, after a foreign professor exposed major flaws in the investigation.
Conflicting speed calculations in high-profile crash
In a serious accident that drew national attention, three Thai experts, including a court-appointed specialist, concluded that the vehicle had been travelling at “no more than 80 km/h”. By contrast, the forensic division of the police, led by Colonel Thanisit Tangchan, calculated a speed of 177–180 km/h, more than double the other findings. This extremely high figure was initially incorporated into the indictment.
International specialist overturns police findings
Because of the stark discrepancy, the court called in internationally recognised crash reconstruction specialist Professor Hermann Steffan. Using physical calculations, digital reconstruction and crash test data, he determined that the actual speed was 76–79 km/h. The court found his work persuasive, stating:
“His methodology was highly credible and the result was very close to the real event.”
said the court, endorsing the three Thai expert opinions.
Court brands police report ‘unreliable and inadmissible’
The court sharply criticised the police analysis. It ruled that Colonel Thanisit’s original calculation of 177 km/h was so inaccurate that it was “unreliable and inadmissible”. The same officer later revised his figure to 79.22 km/h, a reversal that raised pointed questions over how the first, completely erroneous value had been produced.
Lack of transparency over data and methods
Specialists criticised the fact that neither the raw data nor the calculation methods behind the police report were disclosed. According to experts, this lack of openness made independent verification impossible. They warned that such practices could distort investigations in cases of national significance.
Structural weaknesses in Thailand’s forensic system
Legal experts saw the case as evidence of a structural problem in Thailand’s forensic framework. They argued that the system was too dependent on individual opinions instead of independent review teams. One specialist warned that the absence of full data disclosure and systematic cross-checking had wider implications, saying:
“This undermines confidence in investigations of national importance.”
said a legal expert.
Pressure for reform and higher standards
The scandal was expected to intensify calls for reform of forensic procedures. Observers said clearer processes and greater transparency in expert reports were needed to restore trust. The case increased pressure on authorities to raise forensic standards to what critics described as an international level.
Credibility of the justice system at stake
Commentators noted that the judiciary had demonstrated it would no longer tolerate flawed police work. The credibility of the entire system was seen as being on the line in the wake of the ruling. For future high-profile cases, Thailand would have to show it had learned from this error and strengthened its forensic oversight.