When 6 Terabytes Walk Through the Door

How AI, Analytics, and Expert Partnership Transform Criminal Defense eDiscovery

A client calls. The government has produced six terabytes of data from seized devices. Twenty-two phones and computers. Millions of files. Thousands of photos. Years of communications.

The court’s deadlines aren’t changing.

Your team still needs to find the documents that matter.

This is the reality many criminal defense attorneys face today. The challenge isn’t simply reviewing evidence. It’s figuring out how to manage a volume of information that no attorney could reasonably review alone.

The Scale of the Problem

Why Criminal eDiscovery Requires a Different Approach.

Civil litigation teams have adapted to large data volumes over time. But criminal defense presents a distinct and compounding challenge: unlike corporate defendants who produce targeted document sets, the government regularly seizes entire devices, entire accounts, entire digital lives.

One terabyte of data is the equivalent of roughly 6,000 filing cabinets. Criminal defendants often receive multiples of that — delivered in incompatible forensic formats, across different platforms, with no structure and no metadata organization.

The scope is difficult to comprehend. Consider: if a single attorney reviewed 40 pages per hour, eight hours per day, five days per week — a dataset of six million documents would take approximately ten years to complete. That is not a workflow problem. That is a justice problem.



The data arrives in varying formats — forensic images, parsed mobile extractions, proprietary forensic unit outputs. To compare evidence across custodians, it must first all live in the same environment. Getting there requires expert processing — and a partner who can pivot as the scope unexpectedly grows.

From Chaos to Clarity: A Smarter Approach to Data Reduction 

Step One: Strategic Culling Before Review Begins

The single most important efficiency gain in any large-scale review happens before a single document is opened. Pre-processing culling — the intelligent removal of system files, duplicate content, operating data, and clearly non-responsive material — can dramatically reduce the volume of data a review team ever needs to see.

In a recent federal criminal defense matter involving over six terabytes of government-produced forensic images, IST's processing team worked closely with defense counsel to establish scope and timeframeparameters before ingesting any data. Rather than uploading everything, they collaboratively identified what could be safely excluded — reducing the total processing volume before a single document was batched for review.

Processing All Data into a Single Unified Platform

Criminal matters often produce data in incompatible formats. Forensic tools for mobile extractions, disk imaging software, email archiving systems each outputs data differently. When evidence arrives fragmented across multiple platforms, attorneys cannot search across custodians, identify cross-device communications, or build a coherent narrative.

The solution is consolidation. By processing all incoming data — regardless of source format — into a single, structured review environment like Relativity, legal teams gain complete visibility:

• Searchable across custodians: Text messages, emails, and documents from different devices all queried from one place. 
• Cross-device communication mapping: Identify connections between individuals across phones, laptops, and accounts. 
• Consistent metadata: Normalized timestamps, file types, and chain-of-custody records throughout.

Using AI to Reduce Review Burden

Image Recognition: Finding the Needle Without Touching the Haystack

High-volume criminal matters often include tens of thousands of photographs. In a typical device seizure, the vast majority of images are completely irrelevant — personal photos, app screenshots, camera backups. But buried within those files may be the most critical evidence in the case: whiteboard photos, handwritten notes, meeting documentation, or visual records of activity.

Manually reviewing one million photographs is economically impossible. AI-powered image recognition allows review teams to focus attention on the images most likely to matter. IST's proprietary AI toolkit scans images and generates structured metadata descriptions — identifying objects, actions, and contextual elements in each file. Attorneys can then apply targeted search terms to that metadata, surfacing only the images that warrant human review:

• Photos of whiteboards with keyword-matching content 
• Documents containing handwritten search terms 
• Meeting rooms with identifiable participants 
• Visual records of activity relevant to the matter's timeline

Optical Character Recognition: When the Evidence Is Handwritten

Criminal investigations frequently involve physical notes, hand-annotated documents, and handwritten records. These files are invisible to traditional keyword search — they exist in a legal review platform as image files with no extractable text.

AI-powered OCR solves this. IST's tools scan handwritten documents, transcribe the content into searchable text, and tag responsive terms. Common evidence types surfaced this way include:

• Legal pads from key meetings with annotated notes 
• Whiteboard photos capturing planning sessions or diagrams 
• Hand-annotated contracts or agreements 
• Physical correspondence not captured in digital communications

Modern AI transcription tools have made handwritten content far more accessible for review and search. In practice, attorneys have found it more reliable than their own ability to decipher difficult handwriting, because the AI cross-references context to resolve ambiguous characters. 

Analytics-Driven Review: AI That Learns as It Goes

After culling and image processing, the remaining document set still often numbers in the hundreds of thousands. This is where active learning analytics, tools like Brainspace help review teams prioritize documents more efficiently and focus attention on potentially relevant information sooner.

Here is how it works: a managed review team begins tagging documents according to predefined issue codes and relevance categories, guided by a detailed case briefing from defense counsel. As reviewers tag, the analytics engine observes and adapts:

• Non-responsive patterns are deprioritized: Documents similar to those coded irrelevant move to the bottom of the queue. 
• High-value documents surface faster: Relevant categories accelerate to the top as the system learns what matters. 
• Confidence scoring at scale: By the end of review, the engine can indicate a 90%+ probability that remaining documents are non-responsive, giving counsel the confidence to act.

People Behind the Platform

The Project Manager: Your Strategic Partner

Technology without guidance is just noise. The difference between a successful review and a frustrating one often has nothing to do with technology. It comes down to having experienced people who understand the case, communicate consistently, and help attorneys navigate challenges before they become problems.

IST's project managers are sourced from Am Law 100 firms, with deep experience in high-velocity, high-stakes matters. They don't wait to be called, they proactively surface insights, flag emerging issues, and bring options to the table before the attorney has to ask. What that looks like in practice:

• Scope changes absorbed without disruption: When a matter grows from one terabyte to six, the team pivots — no red tape, no delay. 
• Court-ready preparation: PMs help counsel quantify scope, project costs, and present data management plans to judges, including appearing as expert witnesses when needed. 
• 24/7 availability: Urgent needs don't wait for business hours. Neither does IST. 
• Proactive communication: Issues are flagged before they become problems. No ghosting. No guessing.

Criminal matters rarely follow a predictable schedule. New productions arrive unexpectedly. Deadlines shift. Urgent questions emerge after hours. IST is built to respond quickly, providing direct access to experienced project teams when attorneys need answers, not when a ticket reaches the top of a queue. 

Managed Review: Remote, Responsive, Real-Time

IST's managed review teams operate remotely but with full integration into the legal team's workflow. Review is not a black box. Defense counsel interacts directly with reviewers through an in-platform Q&A feature, receiving daily question logs about specific documents, flagging nuanced coding questions, and refining issue definitions as the case strategy develops.



This real-time feedback loop does more than ensure quality. It provides defense counsel with a second set of expert eyes — reviewers who, approaching the documents without the tunnel vision of case immersion, sometimes surface connections and perspectives that the attorneys themselves had not considered.

Addressing the Real Concerns 

The Criminal Defense eDiscovery Gap 

There is a growing and underacknowledged crisis in criminal defense eDiscovery. As government investigations become more digitally intensive, public defenders and appointed counsel are being handed multi-terabyte document productions that they have no technical infrastructure to process.

The worst outcome that is becoming increasingly common is when a criminal defendant’s attorney receives a device dump and simply does not review it. Not because of negligence, but because there is no humanly possible way to do so without support. Every person produces approximately 1.7 megabytes of data every second. Law enforcement collects entire devices. The scope is not going to shrink.



Every defendant deserves a legal team that can fully understand and evaluate the evidence in their case. Access to effective eDiscovery support should not depend on the size of a litigation budget. Our team brings the same level of technical capability and strategic partnership to criminal defense matters, working within funding structures, budget constraints, and the accelerated timelines that criminal cases demand.

The IST Approach: People + Technology + Agility

Large criminal matters rarely go exactly as expected. Data volumes grow. New custodians appear. Production formats change. Deadlines move.

That is why IST focuses on more than technology. We provide experienced project managers, flexible review teams, and proven workflows designed to adapt as a matter evolves.

• Strategic pre-processing culling to eliminate irrelevant data before review begins 
• AI-powered image recognition to surface visual evidence without human review of millions of files 
• Optical character recognition to make handwritten documents fully searchable 
• Brainspace active learning analytics to continuously prioritize the most relevant documents 
• Expert managed review teams with real-time Q&A and daily communication 
• Am Law 100-experienced project managers available 24/7 and prepared to support court proceedings

Because documents build cases. And the attorney who has the best handle on their documents has the advantage.