How Grand Jury Investigations Work in Philadelphia
A grand jury investigation in Pennsylvania is a powerful legal tool used by prosecutors to gather evidence, compel testimony, and determine whether criminal charges should be filed. It operates behind closed doors, without a judge or defense attorney present, and is often used in complex, sensitive cases such as organized crime, corruption, homicide, drug trafficking, or white collar crime.
A witness in a grand jury proceeding is critical in helping the jury determine whether there is enough evidence to bring criminal charges against someone. Witnesses do not have the right to have an attorney present inside the grand jury room, but they can consult one outside before answering. Unlike a trial jury, which decides guilt or innocence, a grand jury reviews evidence presented by prosecutors to assess whether probable cause exists for an indictment.
Why You Need an Experienced Homicide Defense Lawyer
Being called as a witness in a grand jury investigation is not something to take lightly. While you may not be the direct target, your testimony can carry serious legal consequences, both for others and potentially for yourself. Unlike a trial, grand jury proceedings are conducted in secret, without a judge, jury, or defense attorney present.
This means you’ll be responding to questions from prosecutors without the usual legal protections found in a courtroom. What you say can be used in future proceedings and, in some cases, could lead to criminal charges against you. Understanding your rights and risks beforehand is critical, and having experienced legal guidance is the best way to protect yourself.
How We Build Your Defense
Independent Investigation
Every case starts with an independent review of the evidence — not just relying on the government’s version of events.
Work with the Experts
We collaborate with top forensic analysts, investigators, and expert witnesses to strengthen your defense and challenge weak claims.
Prepare Meticulously
From day one, we prepare as if your case will go to trial, ensuring every detail is covered, every angle anticipated.
Set Clear Expectations
From day one, we prepare as if your case will go to trial, ensuring every detail is covered, every angle anticipated.
Grand Jury Witness Services
Before entering a grand jury room, it’s essential to understand your rights, your risks, and your role. At The Law Office of John F. McCaul, we help grand jury witnesses prepare strategically so they don’t walk in blind—and don’t walk out in legal jeopardy.
Legal preparation • Testimony advising • Protection against self-incrimination • Immunity and negotiation strategy
Trusted by Clients.
Respected by Courts.
Every moment counts. We’re ready to fight for you.
Request a Grand Jury Witness Preparation Consultation
Are you a grand jury witness in need of strong legal advocacy? Protect your rights with experienced counsel. John supervised all grand jury proceedings when he was a prosecutor. He has inside knowledge of the procedure, the rules, and the tactics prosecutors will use once a witness is under oath in the grand jury room.
