Computer Based Crimes

In an increasingly digital world, allegations involving computers, the internet, and electronic devices have become among the most technically complex and vigorously prosecuted criminal matters. These cases—commonly referred to as computer-based crimes or cybercrimes—encompass a wide range of offences under the Criminal Code of Canada, including but not limited to:
  • Unauthorized access to computer systems (hacking)
  • Mischief in relation to computer data
  • Possession, distribution, or making available of child sexual abuse material
  • Fraud facilitated by digital means (e.g., phishing, identity theft, online scams)
  • Criminal harassment or uttering threats via electronic communications
  • Voyeurism and non-consensual distribution of intimate images
  • Money laundering or proceeds of crime linked to online activities
  • Any other offence where digital evidence, metadata, internet histories, chat logs, or seized devices form a central part of the Crown’s case

These prosecutions frequently rely on highly technical evidence: forensic imaging of hard drives, analysis of metadata, recovery of deleted files, examination of SQL databases, browser histories, IP logs, and app data. Crown experts often present voluminous reports that can appear overwhelming to the uninitiated. Defending such cases demands not only a deep understanding of criminal law and procedure but also the ability to critically challenge digital forensic methodologies, chain-of-custody issues, and the reliability of expert opinions.Paul Lewandowski has developed a particular niche practice in cybercrime prosecutions.

With over two decades of experience as a trial lawyer, he has handled numerous computer-based cases at all levels of court in Ontario. More recently, he was invited as a guest lecturer at the Crown School Continuing Education Program (2022) in London, Ontario, on the topic of “Cybercrime”—a recognition of his specialized knowledge in this evolving area of law.

To effectively defend clients in these matters, Mr. Lewandowski has created a proprietary software package called Sleuth Forensics, developed in Python and C++. This custom tool enables detailed dissection of seized hard drives, extraction and organization of metadata, unpacking of SQL databases, reconstruction of internet and chat histories, and preparation of the material in a format optimized for cross-examination of Crown forensic experts. This technical edge, combined with meticulous preparation and strategic advocacy, allows the firm to expose weaknesses in the prosecution’s digital evidence and protect clients’ rights at every stage.If you or a loved one is facing charges involving computer-based crimes in Ottawa or elsewhere in Ontario, time is critical. Digital evidence can be preserved, altered, or misinterpreted quickly. Contact Paul Lewandowski Professional Corporation immediately for a confidential consultation. We provide clear, strategic advice and aggressive representation tailored to the unique technical and legal challenges these cases present.