Yeah, the coercive effect of being locked up is usually the big determining factor on whether or not someone takes a plea agreement in order to have a defined sentence instead of being held under high security conditions and being treated like a rabid dog indefinitely.

You look at the statistics of plea bargains compared to people going to trial and possibly winning, then adjust for whether they were on pretrial release and on release pending appeal, vs got locked up for the duration starting with their arrest date, and the figures show that those who get locked up to begin with nearly always take a plea bargain rather than remain locked up indefinitely, and among those who get locked up to begin with and attempt to go to trial, the chances of them not just losing at trial, but getting more charges while locked up on pretrial confinement increase exponentially, and increase with severity when you consider the incentives that everyone from other inmates to facility staff has in making sure the government does not just win a conviction, but wins convictions with more prison time for an increased severity of offense if someone shows such defiance as playing the trial game and going all the way to trial.

Starvation, beating, brainwashing and forced administration of mind altering drugs (most of the "psych meds" readily handed out at jail and prison facilities are well known to have hypnotic side effects, IE, the subject becomes more easily suggestible to both overt and covert mind control techniques.)