Isn&#39;t it a clear conflict of interest that expert witnesses are paid/compensated handsomely for their testimony?
<p>Unless you're in some public office (in which case you are compelled to), expert witnesses are monetarily compensated &quot;handsomely&quot; to offer their testimony. See <a href="https://law.stackexchange.com/a/70502/45435">https://law.stackexchange.com/a/70502/45435</a></p>
<p>But isn't this a clear conflict of interest? If I was told for some Amazon review &quot;We paid this guy thousands of dollars, and he just happened to review us 5 stars ^_^&quot;, how is anyone supposed to believe that? Similarly, in a court, the exact same thing is happening, right? E.g. &quot;We paid this expert engineer thousands of dollars, but he says it's a random error that could've happened, okay? ^_^&quot;.</p>
<p>Or is the fact that expert witnesses get huge payments just completely swept under the rug and out of sight of jury consideration? Similar to how jury nullification isn't explicitly instructed to jurors because it would only complicate the process?</p>

<h2>No</h2>
<p>Experts’ time is valuable.  Courts would not be able to get qualified experts to testify if they were not compensated.  As per your previous question, the crucial point is that they are paid <em>to tell the truth</em>, not to be an advocate for one side.</p>
<h2>But Sometimes Yes</h2>
<p>There have been scandals where a cottage industry of experts sprung up, based solely on there being a market for expert witnesses. These witnesses knew that the way to keep getting hired was to always confidently testify that they could prove the defendant’s guilt beyond a reasonable doubt.</p>
<p><a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5570687/" rel="nofollow noreferrer">Bite-mark analysis</a> is an entire field which is now held to have operated as a pseudoscience, and where some prolific “expert witnesses” <a href="https://reason.com/2009/05/15/a-forensics-charlatan-gets-cau/" rel="nofollow noreferrer">were caught committing fraud.</a></p>
<p>Similarly, the Texas Forensic Science Commission conducted a review of numerous wrongful convictions for arson in 2012, although there the motive was not money.  They were not being paid to testify one way and not the other.  Forensic examiners in Texas were simply basing their testimony on myths and old wives’ tales handed down by their predecessors, which turned out to be false when tested under the scientific method.  When put to the test, accidental fires could cause all the signs that Texas forensic examiners had sworn were proof of the use of an accelerant to commit arson.  Again, though, these “experts” got their jobs by always giving the prosecution the evidence of guilt it wanted.</p>
<p>I have listed examples of experts shilling for the prosecution, mainly because most of the cases that come to mind of highly-compensated experts shilling in defense of someone work for corporations on what are more political than legal controversies.</p>
<h2>Even Then, not Really</h2>
<p>Even in those examples of misconduct (or incompetence), the false experts were caught because the defense was allowed to hire experts of their own.  If the only experts allowed to testify had been the state’s forensic examiners, no one would ever have tested their claims about the difference between arson and accidental fires scientifically.  Even though they had no direct financial incentive to testify, they saw their jobs working for the state as working for the prosecution.</p>
<p>Removing the financial motive would not remove all possible bias or suspicion of bias, either.  For example, in the wrongful-conviction reviews of both bite marks and arson, one of the most common counterarguments were that the experts arguing to overturn the convictions of people who had no money to pay them were passionate opponents of the death penalty, and therefore supposedly biased.</p>

<p><a href="/questions/tagged/united-states" class="post-tag" title="show questions tagged &#39;united-states&#39;" rel="tag">united-states</a> <a href="/questions/tagged/california" class="post-tag" title="show questions tagged &#39;california&#39;" rel="tag">california</a></p>
<blockquote>
<p>Or is the fact that expert witnesses get huge payments just completely swept under the rug and out of sight of jury consideration?</p>
</blockquote>
<p>From personal experience as a juror, it is up to the trial lawyers if expert witness compensation is on the record.  The last trial I was a juror on had dueling expert witnesses.  The prosecution's expert was from the county crime lab.  On cross-examination, the defense attorney asked them if and how much they was being paid for their testimony.  The prosecutor objected, but was overruled so the witness replied that their testimony was part of their job and told us their annual salary (which is public record anyway).  When the prosecutor cross-examined the defense's expert witness they asked the same question, and the expert witness quoted their rates.  During jury deliberations we all found the questions amusing (and a little annoying) because we all knew that the experts were being paid to testify. The fact that both expert witnesses were being compensated had (to the best of my knowledge) no bearing on their credibility or on the resulting verdict.</p>

<h2>Yes, but so what?</h2>
<p>Most (all?) common law countries follow an <a href="https://en.wikipedia.org/wiki/Adversarial_system" rel="nofollow noreferrer">adversarial system</a>, where the court is a referee. Parties run their pre-trial investigation and choose their witnesses with a relatively large degree of autonomy. As such, an expert witness is clearly identified as the witness that one of the sides decided to call. The other side will have an opportunity for cross-examination, to point flaws in their testimony or cast doubt on the expert’s credibility.</p>
<p>Davislor’s answer describes criminal trials. In such instances, one party (the state or federal government) has essentially unlimited resources but bears the burden of proof. By contrast, the defendant usually does not have the resources to put up an opposing expert, but might still decide to try to go to trial for a host of reasons. In that situation, the local &quot;expert witness industry&quot; in topics related to criminal cases is hired disproportionately by the state/feds.</p>
<p>Compare to civil cases. Going to trial in a civil case is an expensive proposition, but even more so when one has to pay experts. Therefore, in the fraction of cases that go to trial, the plaintiff expects that the defendant can pay a large award. In turn, that means the defendant can afford to call expert witnesses of their own.</p>
<p>An extreme example would be Oracle vs. Google, where <a href="https://arstechnica.com/tech-policy/2016/05/google-puts-its-expert-on-the-stand-to-combat-oracle-wraps-up-its-case/" rel="nofollow noreferrer">Google put up an expert witness</a> for matters that could clearly have been explained by some of their internal staff. Presumably, this was done to impress the jury with an &quot;impartial&quot; witness.</p>
<p>Of course, that approach to expert testimony is considered unfair by some. Detractors of the &quot;battle of experts&quot; say that the system favors rich parties who can pay famous experts which will impress the judge/jury, even though the opposing party’s expert might have the better side of the scientific debate. That criticism overlaps with the more general criticism that common-law/adversarial systems are alledgedly more biased towards the rich parties than civil-law/inquisitorial systems.</p>
<h2>Another approach: civil law</h2>
<p>France is a civil-law system with an <a href="https://en.wikipedia.org/wiki/Inquisitorial_system" rel="nofollow noreferrer">inquisitorial system</a>. For criminal cases, the judge(s) is (are) running the show. Experts are called from a local list maintained by the court, and paid by the courts (rather than either party).</p>
<p>The risk of bias in such a scheme is fairly low, because the expert is not compensated by either party. However, courts are notoriously underfunded and experts are paid late and not much, which certainly does not attract the best talent. Another problem is that expert testimony becomes much harder to challenge, as hiring a &quot;counter-expert&quot; is not feasible.</p>
<p>While (to my knowledge) bite-mark analysis never made it into French courts, another pseudoscience did. Psychoanalysis (the Freudian stuff) is by and large considered a pseudoscience by psychiatrists/psychologists. However, many court experts are psychoanalysts, who make it to the expert list thanks to a psychology degree, but use the Freudian (pseudoscientific) analysis when performing their services. There is no Daubert motion to be done to exclude such expert testimony, and that testimony is often written (the French procedure does not require all witnesses to testify orally), so there is not much a party can do to contest it (lawyer: &quot;it’s pseudoscience!&quot; judge: &quot;from our court expert? I don’t think so&quot;). There is an ongoing debate to purge those from the expert list
<a href="https://www.nouvelobs.com/justice/20191022.OBS20163/tribune-pourquoi-les-psychanalystes-doivent-etre-exclus-des-tribunaux.html" rel="nofollow noreferrer">(link in French to an advocacy piece)</a>.</p>
<p>The interested reader might want to consult <a href="https://openknowledge.worldbank.org/handle/10986/2991" rel="nofollow noreferrer">Comparative Study on Expert Witnesses in Court Proceedings</a>, a freely-accessible 2009 report commissioned by the Turkish judiciary, which compares the status of experts across France, Germany, Italy, and the United States in much detail (I only skimmed the executive summary).</p>

united-states witnesses testimony bribery jury-nullification