Does pre-trial detention exist only because of a resources constraint?
<p>A lot of people are talking about alternatives to cash bail recently, which made me wonder, why does pre-trial detention exist in the first place?</p>
<p>My layman's understanding of pre-trial detention is that it's a kind of &quot;buffer&quot; or a necessary evil. The root problem appears to me that we don't have enough judges, public defenders, etc. to get everyone to trial immediately, so we have to hang onto them until a slot opens up. Bail exists because of flight risk, so if in some world there were no need for pre-trial detention, we wouldn't need bail or any alternative.</p>
<p>Is my understanding essentially correct? In other words, does pre-trial detention exist because of a resources constraint? Or is there some more fundamental reason why we have this intermediary step between arrest and trial?</p>
<p>My question is coming from a US-based context, hence my lead-in about &quot;cash bail&quot;. However, I'm curious about pre-trial detention in general, regardless of whether bail is used or what form it takes.</p>

<p>Even if unlimited resources were available, in order to have a fair trial, the prosecution and defense both need time to prepare their cases, research the law, conduct investigations, gather evidence, interview witnesses, seek out experts, order forensic tests, etc, etc. And there will be pretrial motions that have to be prepared, argued, and judged. You have to figure out what's going to happen to the defendant during that time, be it detention, release, bail, or some other alternative.</p>
<p>Shortages of personnel obviously exacerbate the delays, but even without that issue, it's not like the courts could try every defendant on the spot. That would be something like the Wild West, or the Dark Ages; certainly not what the modern world considers justice.</p>

<p>Suspects are considered innocent until found guilty in a court of law. So detaining them <strong>even for one day</strong> needs a justification. Holding the trial instantly is not feasible from the prosecution or defense viewpoint. Justifications for the detention might be:</p>
<ul>
<li>To prevent evidence or witness tampering. Cash bail does not prevent this.</li>
<li>To prevent flight from the trial. Cash bail might actually work for this case if it is set higher than the &quot;cash value&quot; of any possible punishment. So do measures like taking away the passport or requiring them to report to the police in regular intervals.</li>
<li>To prevent further crimes. Of course the initial crime isn't proven at this point, so the legal system needs some contortions to justify this.</li>
</ul>
<p>So if there is no extraordinary likelihood of further crimes, and no evidence to be destroyed, then the defendant should be released until trial unless the expected punishment is so harsh that flight from justice becomes likely.</p>

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