Walter J. Dirkin is an experienced New Jersey criminal defense attorney whose career includes more than two decades of high-level service in the Essex County Prosecutor’s Office. As a former Deputy Chief Assistant Prosecutor, Director of the Sex Crimes Unit, and longtime Assistant Prosecutor, Mr. Dirkin brings an exceptional level of insight, judgment, and courtroom experience to clients facing criminal charges in Essex County and throughout New Jersey.
Few defense attorneys have the depth of Essex County experience that Mr. Dirkin offers. During his career as a prosecutor in Newark, he supervised attorneys and staff, oversaw complex investigations, handled serious criminal prosecutions, worked closely with law enforcement agencies, and helped guide case strategy in matters involving violent crimes, sex offenses, weapons charges, financial crimes, official misconduct, juvenile matters, and other major criminal allegations. His background gives him a rare understanding of how Essex County criminal cases are investigated, charged, presented to the grand jury, negotiated, and prosecuted in Superior Court.
At The Law Offices of Jonathan F. Marshall, Mr. Dirkin uses that experience to defend individuals charged with serious criminal offenses, DWI, domestic violence-related allegations, restraining order violations, weapons offenses, drug charges, assault, theft, fraud, sex crimes, and other matters in Essex County courts. His years inside the prosecutor’s office allow him to evaluate cases from both sides, identify weaknesses in the State’s evidence, and develop defense strategies grounded in a detailed understanding of local procedure, prosecutorial decision-making, and trial preparation.
Former Deputy Chief Assistant Prosecutor in Essex County
Mr. Dirkin served as a Deputy Chief Assistant Prosecutor in the Essex County Prosecutor’s Office from 2011 to 2025. In that leadership role, he supervised a team of professionals, provided strategic direction, and served as a key member of the Executive Staff. His responsibilities included oversight of specialized units handling white collar crime, official corruption, financial crimes, insurance fraud, and asset forfeiture.
He also directed high-profile prosecutions, coordinated joint investigations with state and federal agencies, reviewed charging decisions, negotiated plea agreements and settlements, and represented the Prosecutor’s Office in meetings with law enforcement agencies, government officials, and community organizations. This high-level experience is especially valuable for clients charged in Essex County because Mr. Dirkin understands how prosecutors analyze evidence, assess risk, make charging decisions, and decide whether a case should be downgraded, diverted, negotiated, or pursued aggressively.
Mr. Dirkin’s work also included participation in the Critical Incident Response Team, where he was involved in investigations of police-involved shootings and in-custody deaths. He delivered continuing legal education lectures for attorneys and provided instruction to police recruits, further reflecting the level of trust placed in him as a prosecutor, trainer, and legal strategist.
Extensive Experience in Serious Criminal and Sex Crimes Prosecutions
Before serving as Deputy Chief Assistant Prosecutor, Mr. Dirkin was the Director of the Essex County Prosecutor’s Office Sex Crimes Unit. In that role, he supervised investigations and prosecutions involving sexual assault allegations, elder abuse, human trafficking, sex crimes, and related offenses. He also oversaw protocols related to forensic examinations, coordinated with law enforcement, worked with advocacy organizations, and trained prosecutors, police officers, and medical professionals on issues involving sex crimes prosecution.
This background gives Mr. Dirkin significant insight into some of the most sensitive and serious cases in the criminal justice system. Sex crime allegations often involve complex evidence, including witness statements, forensic findings, digital evidence, DNA issues, consent questions, delayed reporting, and credibility disputes. Mr. Dirkin understands how these cases are built by prosecutors and how they must be carefully examined by the defense.
Earlier in his career, Mr. Dirkin served as an Assistant Prosecutor in Essex County, where he handled criminal jury trials involving serious charges, including sexual assault, homicide, and gun violence. He also managed multiple units, including Sex Crimes, Gun Strategy, Adult Trials, and Juvenile matters, and handled grand jury presentations, plea negotiations, bench trials, legal briefs, search warrant issues, arrest procedure questions, and evidence collection matters.
A Powerful Advantage for Essex County Defense Clients
Mr. Dirkin’s experience is especially important for clients facing criminal charges in Newark and throughout Essex County. Criminal cases in Essex County may begin with a local police investigation, a municipal court complaint, a domestic violence incident, a drug or weapons arrest, or an indictment-level allegation handled in the Superior Court. The early decisions made by prosecutors can have a major impact on the direction of the case.
Because Mr. Dirkin spent much of his career making, reviewing, and supervising those types of decisions, he is well-positioned to anticipate how the State may approach a case. He understands what prosecutors look for when evaluating witness credibility, physical evidence, forensic reports, body camera footage, police procedure, search warrants, charging decisions, plea offers, diversion applications, and grand jury presentations.
For clients, that experience can be extremely valuable. A strong defense often depends on knowing where to look for weaknesses, how to challenge the assumptions behind the charge, and how to present mitigating facts in a way that can influence the outcome. Mr. Dirkin brings that perspective to every case he handles.
Criminal Defense Matters Handled by Walter J. Dirkin
Mr. Dirkin represents clients in a wide range of criminal defense matters, including:
- Assault and aggravated assault
- Domestic violence-related criminal charges
- Restraining order violations and contempt charges
- Weapons and firearm offenses
- Drug possession and distribution charges
- Theft, burglary, robbery, and fraud offenses
- White collar and financial crime allegations
- Official misconduct and public corruption investigations
- Sex crimes and internet-related allegations
- Juvenile criminal matters
- DWI and serious traffic offenses
- Pretrial detention and release issues
- Grand jury and indictment matters
- Probation violations and post-charge proceedings
If you have been arrested, charged, or contacted by law enforcement in Essex County, Walter J. Dirkin can help you understand the allegations, the court process, the potential consequences, and the defense options that may be available. His background as a former high-ranking Essex County prosecutor gives him a unique ability to evaluate the State’s case and develop a defense strategy tailored to the facts.
