Jack McCann, Managing Partner

John P. McCann retired NYPD Detective First Grade, with a career of 27 years. Mr. McCann’s public sector service includes the following:

  • Tactical Police Force: This assignment facilitated in effecting arrests in four of the five Counties of NYC excluding Staten Island.
  • Detective Division: The Brooklyn North Detective Borough Command resulted in over 50 arrests prosecuted by the Brooklyn District Attorney’s office (all felony arrests).
  • 8th District Homicide in the South Bronx: Mr. McCann was responsible as the primary case Detective for over 50 homicide investigations and assisted in over 200 homicides investigations. All of which required trial participation with the Bronx District Attorney’s Office.
  • Bronx District Attorney’s Office Squad: Mr. McCann assisted in the preparation of 23 prosecutions of Italian Organized crime members including associate members, Capo’s and one under boss for extortion; loan shacking; and conspiracy to commit murder. 21 of the 23 defendants were convicted.
  • Major Case Squad: Based at 1 Police Plaza where he worked city wide with the District Attorney’s office of New York County, Bronx County, Queens County, King County, on the prosecutions of persons arrested for kidnapping for ransom; Bank Robbery; Burglaries in excess of 250 thousand dollars, (i.e. Thefts of jewelry, art, cars); hijackings; Police Office Homicides and cases the Chief of Detectives assigned on an independent basis to the major case Squad.
  • Mr. McCann was also deputized as a Federal Deputy Marshal, First by the Marshal Romulo Immundi of Southern District New York and additionally by the Marshals of Eastern District of New York Charles Healy. This was renewed annually by successive Marshals over the period of fifteen years.

Case Highlights:

  • Client: Anthony Siano, Esq. – Supervised team of investigators in a political corruption case in Southern District New York. US v Jeries
  • Client: Diageo North America – Lead investigator in theft of products in excess of $300k of liquor by 2 dishonest vendors. Recovered in excess of 30k and received admissions of guilt. The case was prosecuted in NY County District Attorney’s office after they plead guilty.
  • Client: Ellen Baken, Esq. – Supervised team of investigators in clearing her client from allegations of sexual molestation. Westchester County D.A. office decline to prosecute her client.
  • Client: Grant’s International – Lead investigator as a sub-contractor to a London based investigative company who represented multiple perfume companies in regards to counterfeit goods and product diversion. Investigation was in metro NY area and it led to negotiated settlements between company and miscreants.
  • Client: Mark Lane, Esq. – successfully located at least 5 heirs on a case in Newark’s Surrogate Court in New Jersey.
  • Client: Perdue – Theft of products by dishonest employees in excess of 30k. Investigation involved surveillance, & interviews. Admissions by employees resulted in dismissal of employees. No criminal prosecution pursued.
  • Client: Kool Pak – Threats of physical violence against owner of Kool Pac and employees. The investigation resulted in the author of such threats stopping in making the threats. Civil litigation in Texas resulted in Kool Pak winning the lawsuit.

Expert Certifications:

On a number of occasions Mr. McCann was deemed an expert witness in Federal Court. He was deemed an expert witness in Southern and Eastern District of New York as well Federal Court Newark, New Jersey.

  • Judge Eugene Nickerson in Eastern District of New York regarded duo prosecution of John Gotti Sr.
  • Newark, New Jersey Fatico hearing of Raymond Resildo.
  • Southern District New York, Judge John Keenan

Professional Organizations:

Mr. McCann has been or is involved in the following private/public sector professional organizations:

  • American Academy of Professional Law Enforcement
  • The Overseas Security Advisory Council
  • National Law Enforcement Associates
  • National Business Aviation Association
  • International Association of Credit Card Investigators
  • International Association of Chiefs of Police
  • The American Society for Industrial Security
  • Retired Detectives of the Police Department of the City of New York
  • Jewelers Security Alliance
  • Association of Certified Fraud Examiners, retired
  • International Association of Law Enforcement Intelligence Analysts
  • U.S. Coast Guard Auxiliary
  • Federal Law Enforcement Officers
  • Association of Former Federal Narcotics Officers
  • National Cargo Security Council
  • American Academy for Professional Law Enforcement
  • International Association of Asian Crime International Cargo Theft Council Association

Daniel Weiss, Managing Partner

Mr. Weiss began his career in the security industry while in graduate school at Northeastern University, where he worked at a maximum security prison in Massachusetts, Walpole State Prison. Mr. Weiss left the public sector and entered the private security sector. During the past 15 years, Mr. Weiss has held managerial positions at Wells Fargo and Chubb. Mr. Weiss was also founder and CEO of EPS Security and Infrastruct Security. Mr. Weiss is the founding Texas partner of McCann Investigations, LLC, a Texas Corporation. Mr. Weiss has been interviewed as a subject matter expert on security by ABC, NBC, CBS, Security Director News, SDM, and Security System News. In addition Mr. Weiss has been featured in the Houston Chronicle and Houston Business Journal. Mr. Weiss brings extensive experience as a security professional in the area of private investigation, computer forensics, loss prevention, electronic security system design, and surveillance. As an industry entrepreneur, Mr. Weiss brings his wealth of knowledge in business with extensive experience in due diligence, private equity and venture capital, and financial controls. Mr. Weiss’ background supports the unique balance between business and former law enforcement that is a unique hallmark of McCann Investigations. For over 15 years, Mr. Weiss has held a qualified managers license in State of Texas. Mr. Weiss has been directly responsible for hundreds of security assessments for Fortune 1000 companies and government agencies. In addition, Mr. Weiss has had the pleasure of providing investigative services for scores of middle market commercial, industrial and direct to executives.In addition, Mr. Weiss has been utilized as an expert by law firms involving complex civil and criminal matters.


  • Network Intrusion: Identification and forensic documentation of a network intrusion of a municipal government agency involving credit card and personal information being stolen.
  • Non-Compete Enforcement: Numerous cases of forensic documentation of downloaded customer data, conspiracy with current and former employees, and direct theft of company materials.
  • Intellectual Property Theft: Numerous cases of current and former employees and competitors stealing and damaging company intellectual and physical property.
  • Harassment and Cyber Stalking: Investigation and forensic documentation of inner company email based harassment and attempt to cover up activity.
  • Digital Wiretapping: Numerous investigations of cyber wiretapping of servers, desktops, laptops and mobile devices conducted by unwanted parties.
  • Background Investigations: Provided executive background investigations for management teams for Private Equity and Venture Capital firms.

During his career in the public and private sector Mr. Weiss has been personally instrumental in over 500 site security assessments ranging from:

  • Financial Institutions
  • Jewelry and Precious Metals Vaults and Storage
  • High Profile Residences Including Former Government Officials
  • Petrochemical Facilities
  • Defense Sector Providers
  • Public/Private Critical Infrastructure: Dams, Nuclear Power Plants, and Pipelines

Mr. Weiss also believes in the importance of law enforcement and the private sector working together. Examples of this commitment are found in various committees and associations that he currently serves:

  • Crime Stoppers
  • American Society for Industrial Security
  • Energy Security Council
  • Entrepreneur Organization (EO)

Brett Dearman, Computer Forensics Examiner

Brett Dearman has lead or participated in over 200 internal investigations of varying complexity from 2002 to present in the role of digital forensics examiner. These include alleged corporate espionage, theft of intellectual property, illegal trading practices, possession and distribution of pornography, and Human Resources related issues. Many of the collections were performed after normal working hours or by covert action. Mr. Dearman performed or assisted with numerous e-discovery initiatives including probable cause for reasonable termination. This includes the preliminary examination of personal computers and/or network servers as part of e-discovery. In the course of these investigations, interaction with attorneys, federal agents and law enforcement officers was common. Mr. Dearman created Dynegy’s digital forensics lab in 2002 in response to investigations being conducted by the Department of Justice as well as a number of pending civil suits. With the assistance of former FBI and law enforcement officers, he developed the processes and procedures for digital forensic examination including proper evidence collection, processing and storage, chain of custody documentation, examination and reporting. During this process, he was trained on the forensics examination system EnCase (Guidance Software, Inc.) and ultimately obtained their Encase Certified Examiner certification.


  • CNE – Certified OS/2 Engineer
  • COE – AccessData Certified Examiner – Forensic Toolkit
  • COLE – Certified OS/2 LANServer Engineer
  • MCP – Microsoft Certified Professional
  • MCP+I – Microsoft Certified Professional + Internet
  • MCSE – Microsoft Certified Systems Engineer
  • CMA – Certified Metaframe Administrator
  • ACE – Encase Certified Examiner (Guidance Software, Inc.)
  • EnCE – Certified Information Systems Security Professional
  • CISSP – International Security Certification Consortium
  • CPE – Certified PGP engineer (PGP Encryption)
  • Certified Netware Engineer
  • Certified Ethical Hacker
  • Certified Penetration Tester

John M. Ryan, Investigator

Mr. Ryan retired from the New York City Police Department as a First Grade Detective after 33 years of service. Mr. Ryan has lectured on kidnapping investigations, executive protection and premises security for the Chief of Detectives Training Unit of the NYPD, John Jay College of Criminal Justice, the Eastern Armed Robbery Association and the Jewelers Security Alliance. He is a noted authority on executive protection and physical security and has received certification in Specialized Protective Security Training from the New York City Police Department Intelligence Division and the United States Secret Service. Mr. Ryan is a diplomat of the American College of Forensic Examiners International, holding a certificate in Homeland Security Level III. During his career in the public and private sector Mr. Ryan has been personally instrumental in:

  • Hundreds of undercover investigations regarding terrorism and terrorism related activities
  • Major multi-state Organized Crime Investigations
  • Thousands of background investigations for government and private companies
  • Executive protection and high profile persons risk profiling
  • Hundreds of complex financial frauds and lead scores of fraud recovery cases

Mr. Ryan also believes in the importance of law enforcement and the private sector working together. Examples of this commitment are found in various committees and associations that he currently serves:

  • Preparation and Response Team for Homeland Security in the New York Metropolitan Area.
  • American Society for Industrial Security
  • Overseas Security Advisory Council of the U.S. State Department
  • National Cargo Security Council
  • American Academy for Professional Law Enforcement
  • National Law Enforcement Associates
  • American College of Forensic Examiners

Marc Miller, General Counsel

Over the past 20 years, Mr. Miller has held several prestigious positions within the public and private sector. Mr. Miller began his legal career as an Assistant District Attorney in Harris County (Houston), Texas where he conducted over sixty trials in county and district court including murder, sexual assault, armed robbery and narcotics. Next, Mr. Miller joined the United States Justice Department where he held a variety of positions over his 10-year tenure with the Justice Department. Mr. Miller served as an Assistant United States Attorney assigned to an Organized Crime Task Force section responsible for prosecution of complex money-laundering, conspiracy, wire-tap and narcotics cases where he managed teams of investigative agents to successful prosecution of multiple organized crime syndicates. Mr. Miller also served as Field Division Counsel on a senior management team with responsibility for administering legal advice to management, investigative agents and staff in 49 county San Francisco Bay Area. Lastly, Mr. Miller served as Assistant Deputy Chief in the U.S. Department of Justice’s Computer Crime and Intellectual Property Section where he managed teams of investigative agents in the prosecution of intellectual property and computer crime offenses including copyright infringement, theft of trade secret, unauthorized computer access and trafficking in counterfeit goods. While with the Justice Department, Mr. Miller held high level security clearances of Top Secret (TS) and Secure Compartmented Information (SCI). Additionally, Mr. Miller led extensive training both domestically and internationally where authored training materials for use by attorneys and investigators. Mr. Miller entered the private sector to work at Nintendo of America where he was charged with protecting a large portfolio of intellectual property, including both online assets and physical products. Mr. Miller was responsible for the Americas and Asia Pacific region and traveled extensively in both regions while developing both business and legal relationships to further company objectives. In his role with Nintendo, Mr. Miller regularly debriefed & trained high level executives on complex technical matters relating to the theft of intellectual property and the company online ecosystem. Mr. Miller then accepted a position as Senior Vice President for the Motion Picture Association of America (MPAA) where he worked exclusively on behalf of the six major Hollywood studios to protect their intellectual property. Mr. Miller was responsible for running global programs with personnel in 37 countries. He developed and implemented key strategies to protect emerging business models and served as the public face on behalf of studios in high-profile settings relating to technology, intellectual property protection and online issues. As part of his role as SVP for Internet Content Mr. Miller met with CEOs and high level government officials to discuss complex technical & legal issues offering strategic input and legal perspective.

Career Highlights:

  • In excess of 60 trials conducted in state & county courts.
  • Trial of 3 jury trials in federal district court.
  • Presentation of oral arguments before the U.S. 5th Circuit Court of Appeals.
  • In excess of 100 depositions conducted personally including jury trial of 1 civil wrongful death case.
  • Authored chapter in published U.S. Department of Justice Intellectual Property Crimes manual.
  • Conducted training and outreach on technology and intellectual property rights in Asia (China, Japan & Thailand), South America, Central America and United States. Presentations include: private industry conferences (Gray Market Conference, Internet Piracy Conference), Patent and Trademark Office conferences (Global IP Academy and China Internet IP Enforcement) and law enforcement conferences (IP and Complex Online Crime).
  • Led U.S. Justice Department Online Anti-Piracy Initiative involving software, movies, games and counterfeit goods. Investigations involved extraordinary technological challenges and international components.
  • Led prosecution of illegal wire-tapping cases involving “Loverspy” software in violation of federal wire-tapping statutes.
  • Completed multiple confidential non-compete & trade-secret investigations involving theft of proprietary information involving large corporations
  • Conducted live media interviews relating to high profile legal case on behalf of MPAA.
  • Met with foreign Supreme Court officials regarding intellectual property matters.
  • Personally led successful enforcement of high-profile intellectual property cases resulting in media coverage featured in both print by the Washington Post and online at wired.com.
  • Personally led federal law enforcement activities resulting in violators pleading guilty and recording promotional videos on behalf of Business Software Association (BSA) and Software Information Industry Association (SIIA).
  • Received the Justice Department’s 2008 Award for Protecting the Integrity of the American Marketplace for leading Anti-Piracy efforts.
  • Received 2008 Anti-Piracy Leadership Award for leading Anti-Piracy efforts.
  • Served as management liaison for U.S. Justice Department at meetings with IP “czar” and other senior White House officials relating to IP policy, strategic goals and budgeting.
  • Served as management liaison for U.S. Justice Department to the National Intellectual Property Rights Center, a multi-agency coordination center aimed at IP enforcement and training.


McCann continually engages the important topics that are most relevant to our clients.  McCann publications provide insight and information to our clients with our white papers, guides, and case studies.  All publications are available in iTunes, Paperback, or FREE digital download.