What the judge actually decides
A preliminary hearing is not a trial. The judge decides one question: whether the Commonwealth has presented a prima facie case — evidence that, if believed, shows a crime was committed and the accused committed it. Credibility is not weighed and guilt is not decided. But the judge rules charge by charge, which means individual counts can be dismissed or reduced even when others remain and move forward.
Why this hearing shapes the whole case
The preliminary hearing is usually the defense's first look at the Commonwealth's witnesses, months before formal discovery. Testimony given there is under oath — and a witness who testifies one way at the preliminary hearing and another way at trial has handed the defense impeachment material that lasts the life of the case.
It is also where overgraded charges get corrected. An aggravated assault charged as a first-degree felony on thin evidence of serious bodily injury, a theft graded above what the value supports — holding the Commonwealth to its burden at this stage changes bail amounts, guideline exposure for sentencing, and the entire negotiating posture that follows. A dismissal at the preliminary hearing is not always permanent, because the Commonwealth can generally refile — but it forces the prosecution to show its cards.
Waiving the hearing is a decision, not a formality
Hearings are sometimes waived in exchange for something concrete: a bail reduction, an agreement on ARD admission, or negotiated plea terms. In some counties, applying for ARD requires waiving the hearing. A waiver gives up none of the defenses that matter at trial — suppression motions and every trial right survive. What it gives up is the chance to test and lock in testimony. Whether that trade makes sense is a case-specific, strategic decision, and it deserves more thought than it usually gets in a courthouse hallway.
