“A rare skill for those in the legal profession.”TechCrunch
Our expertise lets us uncover the facts and present them compellingly — in motions, at trial, and if necessary, on appeal.
From the first meeting, we focus on how our combination of technical expertise and courtroom skill can achieve the best possible outcome, at every stage from pre-suit negotiations and motion practice through trial.
From investigation through trial and sentencing, including RICO, bank and wire fraud, money laundering, narcotics trafficking, and cybercrime cases.
Criminal and civil appeals in federal and state courts, including reversals in the Appellate Division, First and Second Departments.
Motions to vacate convictions and sentences under 28 U.S.C. § 2255 and CPL § 440, compassionate release, and sentence reductions.
Civil cases where technology is at the center, from injuries caused by defective software to computer fraud, trade secret, and cryptocurrency disputes.
Business and commercial disputes in state and federal court, including Internet defamation claims and identifying anonymous posters.
Partnering with other attorneys on matters involving technical evidence or complex trials, as co-counsel or consulting experts.
We are committed to the cutting-edge and ethical use of artificial intelligence, in accordance with the highest ethical standards. By leveraging technology, our focused team can often move faster and more cost-effectively than much larger firms. Mr. Horowitz has lectured on cybersecurity ethics, including the ethical use of AI.
In state and federal criminal matters
For clients facing years in federal prison
Reversals in the First and Second Departments
For clients harmed by the wrongdoing of others
Charged with aiding and abetting the Pulse Nightclub shooting. As the defense's cyber forensics expert, Mr. Horowitz distilled several terabytes of device data and server logs into a clear presentation demonstrating that no device seized by the government had accessed the Pulse Nightclub web server.
“The rarest of defeats” for federal prosecutors.The New York Times
Retained as co-counsel to focus on cell phone forensic and call detail record data at the heart of the prosecution's case. Mr. Horowitz's cross-examination showed that the police had failed to follow basic forensic principles, forcing a prosecution expert to concede that key evidence had been altered.
“The contents of the [text message database file] was modified sometime after the cell phone was taken into police custody.”Prosecution expert, on cross-examination
Retained as co-counsel to analyze terabytes of forensic data from servers worldwide. His 18-page declaration challenged the FBI's account of how it located the Silk Road server in an Icelandic data center and withstood scrutiny from computer experts around the world.
Read the Horowitz Declaration“I will follow your excellent counsel's recommendation and sentence you to [the minimum].”
Prior results do not guarantee a similar outcome.
Mr. Horowitz has achieved extraordinary results in some of the most complex and difficult matters, owing to his legal acumen, courtroom skill, and litigation strategy. He is a member of the Criminal Justice Act panels for the Southern and Eastern Districts of New York, where he represents individuals charged with racketeering, money laundering, international narcotics trafficking, fraud, and other federal crimes. He was named a Top 40 Under 40 criminal defense lawyer by The National Trial Lawyers in 2023, 2024, and 2025.
He has also been qualified as an expert in cybersecurity and computer forensics in state and federal courts throughout the country, and has litigated some of the most technologically complex cases of the modern era. He also lectures on cybersecurity ethics, including the ethical use of AI.
He is admitted to practice in New York, New Jersey, and California.
Full biography