Southside Snark:  From what you say, it's not more prison space that is needed here but more jail space.  If you want 'real' bails and 'bonds' set for pretrial suspects you must have a place to house them.  As it stands now, those that run the jails cry to the Judges when the jails are at or near capacity asking for their 'help' in dealing with any overcrowding.  That ends up resulting in two things.  One, lower time for those sentenced to jail (unless they are serving mandatory time - usually for traffic offenses) or two, lower bails for 'lesser' crimes (i.e. property crimes).
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And we 'do' also need more prisons because what is needed here are but real prisons (instead of guest houses with full bennies) as well as revised conditions within those prisons (eliminating the hotel like atmosphere and adding​ the 'hard labor' aspect!