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I am sorry to hear about this situation. What often happens is that a bail is set "automatically" when someone is arrested and processed, and later the bail is upheld/modified by the Judge at the hearing, either on motion of the Defendant or by process of the criminal charge. At that point, his bail may be lowered, for example, depending on his financial ability, flight risk, etc.
If you bond him out, the bail hearing is likely going to be waived, although he'd likely still have to show up for an Arraignment (to plead guilty or not guilty) and then still have the case reset. It will be reset several times until he decides to take a plea deal or take his chances at trial.
NOTE that if you bond him out, the overwhelming presumption will be that he can afford counsel. If he stays in jail, he will likely be awarded a public defendant.
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