05/09/2026
BEYOND THE SCREEN
Rethinking Digital Evidence, Cell Towers, and the Human Cost of Technological Illusion in Criminal Trials !!!
Adv. Zulfikar Khan Nasir
Former Judge • Amicus Curiae • Forensic Criminologist • Criminal Defence Mentor • Honorary Researcher (IFNLS) • Trustee – (MSPUI)
📧 [email protected] | 📱 +92 300 7600232 • +92 334 4551214
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Introduction
Criminal justice has entered an age of invisible witnesses.
Every call, message, GPS interaction, Wi-Fi connection, Bluetooth pairing and digital transaction may leave behind an electronic footprint. Consequently, Call Detail Records (CDRs), Cell Site Location Information (CSLI), geo-fencing data, smartphone extractions and wearable-device artefacts are increasingly finding their way into criminal trials.
These technologies can be extraordinarily useful. But technological sophistication carries a dangerous psychological temptation: the belief that whatever appears on a screen must be accurate.
A colourful map, a precise-looking timestamp or a pulsing red location marker can create an impression of scientific certainty. Yet an algorithm is not a witness, a database is not infallible, and a digital trace does not automatically establish human conduct.
The judicial question therefore cannot simply be:
What does the device show?
It must be:
What exactly does the data prove, how reliably does it prove it, and what alternative explanations remain?
The distinction is fundamental because, in a criminal trial, liberty cannot be sacrificed upon technological illusion.
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1. The Smartphone: A Digital Shadow, Not a Digital Truth
The modern smartphone is an extraordinary repository of human activity. Depending upon the device and circumstances, forensic examination may reveal messages, application data, browser history, photographs, location information, cloud synchronisation, Wi-Fi connections, Bluetooth interactions and deleted or residual data.
But volume is not reliability.
Digital evidence is only as trustworthy as the processes through which it is identified, preserved, acquired, examined, interpreted and presented.
A sound mobile-forensic methodology ordinarily requires a disciplined sequence:
Identification → Preservation → Acquisition → Examination/Analysis → Interpretation → Reporting
Any weakness in this chain can affect the evidentiary value of the final product.
The investigator must therefore establish:
* who seized the device;
* when and from where it was seized;
* whether its condition was documented;
* how it was isolated from networks;
* how its contents were acquired;
* whether the acquisition was forensically sound;
* what tools and methodology were employed;
* whether the original data remained preserved; and
* whether the resulting report accurately distinguishes raw data from expert interpretation.
The central principle is simple:
An extracted file is not automatically a proven fact.
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2. Cell-Tower Evidence: The Myth of the “Dot on the Map”
Perhaps nowhere is technological overconfidence more dangerous than in cellular-location evidence.
A CDR may demonstrate that a particular SIM or device communicated through a particular cell site at a particular time. But that does not necessarily establish that the accused was physically present at the crime scene.
A cell tower is not a GPS beacon.
Its effective coverage may depend upon tower configuration, antenna orientation, terrain, buildings, network architecture, signal propagation, network congestion, sectorisation and the availability and behaviour of neighbouring cells.
The device may connect to a cell that is not geographically the closest cell.
Therefore, the proposition:
“The accused’s phone connected to Tower X; therefore the accused was at the crime scene”
contains a critical logical gap.
Pakistani case law has recognised that a CDR is not conclusive evidence for determining and establishing the identity or exact presence of a person at a particular locale.¹
At most, cellular evidence may place a device or SIM within an area served by particular network infrastructure, subject to the technical characteristics and limitations of that network.
It does not, by itself, establish:
1. the precise location of the handset;
2. that the handset was physically with the accused;
3. that the accused personally used the handset; or
4. that the accused participated in the offence.
A cellular association is not an identification of a human being.
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3. Geo-Fencing: A Net for Investigation, Not a Verdict
Geo-fencing can be an effective investigative technique. It may identify devices that were active within a defined geographical area during a specified period.
But its evidentiary significance must not be overstated.
A geo-fence captures devices, not offenders.
Within a defined area may be residents, workers, commuters, delivery riders, emergency personnel, visitors and entirely innocent bystanders.
The presence of a device inside a geo-fenced area may therefore generate an investigative lead, but it does not automatically establish criminal participation.
The danger arises when an investigative filter is transformed into proof of guilt.
A digital net may identify thousands of devices; the prosecution must still establish which human being committed the crime and how the digital evidence connects that person to the criminal act.
Otherwise, an investigative tool risks becoming a mechanism by which the accused is effectively required to explain an otherwise innocent digital presence.
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4. Wearables and the Internet of Things: The New Digital Witnesses
The evidentiary frontier is expanding beyond smartphones.
Smartwatches, fitness trackers, wireless earbuds, vehicle systems and other Internet-of-Things devices can generate valuable forensic artefacts.
Even devices such as Apple AirPods may leave ecosystem-related traces, including Bluetooth identifiers, pairing information, connection events and associated telemetry.
Such artefacts may sometimes assist in reconstructing a timeline.
For example, a connection or disconnection event may become relevant when examining an alleged journey, meeting, vehicle movement or alibi.
But sophisticated technology does not eliminate the need for elementary forensic caution.
Investigators and courts must consider:
* time-zone differences;
* clock synchronisation;
* device clock drift;
* duplicated or shared accessories;
* account sharing;
* automated background connections;
* incomplete logs;
* software updates; and
* limitations of the particular extraction methodology.
A timestamp is evidence of a recorded event.
It is not necessarily proof of the human intention behind that event.
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5. Digital Evidence Has Two Questions: Authenticity and Meaning
One of the most important distinctions in digital-evidence litigation is between:
“Is this data authentic?”
and
“What does this authentic data actually prove?”
Even reliable data can be given an unreliable interpretation.
A genuine CDR may establish a communication.
It does not necessarily establish who was holding the phone.
A genuine location record may establish a device’s interaction with a network.
It does not necessarily establish the precise physical location of its owner.
A genuine digital message may establish that a message existed on a particular account or device.
It does not automatically establish who physically authored it.
Thus:
Authenticity does not equal culpability.
The court must separately examine the evidentiary inference sought to be drawn from the authenticated material.
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6. The Legal Gatekeeping: Digital Evidence Must Be Proved, Not Presumed
The Qanun-e-Shahadat Order, 1984 recognises evidence becoming available through modern devices, while the law governing electronic evidence requires the court to examine its relevance, authenticity and manner of proof.²
The Supreme Court in Ishtiaq Ahmed Mirza and others v. Federation of Pakistan and others, PLD 2019 SC 675, laid down important safeguards concerning audio and video evidence, including proof of genuineness and absence of tampering or doctoring, and emphasised that even when such material is allowed into evidence, it must still be proved in accordance with the law of evidence.³
The jurisprudence therefore does not support a proposition that electronic material becomes trustworthy merely because it has been extracted from a computer, mobile phone or telecommunications system.
The courtroom should never become a place where technological appearance substitutes for legal proof.
The relevant questions include:
* Was the material lawfully obtained?
* Was the original source identified?
* Was the device or system properly secured?
* Was the chain of custody maintained?
* Was the extraction methodology reliable?
* Is the expert competent to interpret the material?
* Are the timestamps reliable and synchronised?
* Does the evidence identify a person—or merely a device?
* Are there innocent or alternative explanations?
* Does the digital evidence independently connect the accused with the criminal act?
* Is the inference consistent with the remainder of the prosecution evidence?
The Supreme Court’s jurisprudence on electronic evidence consequently calls for **authentication, integrity and lawful proof—not technological reverence.**³
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7. The Defence Lawyer’s Digital-Evidence Checklist
For the criminal defence, digital evidence should never be approached merely as a technical report to be accepted or rejected wholesale.
It should be deconstructed.
Identity
Does the evidence identify the accused—or merely a SIM, account, device or IP address?
Location
Does it establish precise physical presence, or merely association with a network, tower or geographical area?
Possession
Who actually controlled or possessed the device at the relevant time?
Integrity
Has the original data remained intact from seizure through analysis?
Methodology
What forensic tool, version, procedure and extraction method were used?
Chronology
Are the relevant systems synchronised? Could timestamps have been affected by time zones, clock drift or system settings?
Chain of Custody
Who handled the device or data, when, where and for what purpose?
Interpretation
Is the conclusion contained in the forensic report actually supported by the underlying data?
Alternative Explanation
Can the same digital circumstance reasonably exist without the accused committing the offence?
This last question may be decisive.
Criminal evidence must exclude reasonable doubt; it is not enough that technology makes the prosecution’s theory appear plausible.
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8. The Human Cost of Technological Illusion
There is a deeper constitutional dimension to this discussion.
A technological error in a commercial dispute may cause financial loss.
A technological error in a criminal trial can take away a person’s liberty—or life.
That is why the courtroom must resist automation bias: the unconscious tendency to give excessive weight to information merely because it appears to have been generated by a machine or sophisticated system.
The law does not require the court to distrust technology.
It requires the court to understand its limits.
The proper judicial attitude is neither technological scepticism nor technological worship.
It is forensic neutrality.
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Conclusion: Look Beyond the Screen
Technology will continue to evolve. Tomorrow’s courtroom may contain evidence from devices that today do not even exist.
But one principle should remain unchanged:
The sophistication of the evidence does not determine the strength of the proof.
A smartphone is not its owner.
A SIM card is not a person.
An IP address is not an identity.
A cell tower is not a precise address.
A geo-fence is not a crime-scene identification.
A timestamp is not human intention.
And a digital trace is never, by itself, synonymous with guilt.
The ultimate purpose of criminal adjudication is not to achieve technological certainty, but to reach lawful, rational and reliable proof beyond reasonable doubt.
The modern criminal court must therefore learn to look beyond the screen.
Because when liberty is at stake, the question is not whether technology can tell a story—it is whether the evidence proves that story beyond reasonable doubt.
In criminal justice, pixels may inform the inquiry; only legally reliable proof can justify a conviction.
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Footnotes
1. See Muhammad Imran v. The State, 2020 SCMR 857; see also the jurisprudence recognising that a CDR is not conclusive for determining the identity or exact presence of a person at a particular place. The proposition has also been expressly applied in subsequent Pakistani case law concerning CDR evidence. (PLJ Law Site)
2. Article 164, Qanun-e-Shahadat Order, 1984. The provision recognises evidence made available through modern devices, subject to the court’s determination of its propriety and evidentiary value.
3. Ishtiaq Ahmed Mirza and others v. Federation of Pakistan and others, PLD 2019 SC 675. The Supreme Court laid down requirements concerning the genuineness, integrity and proof of audio/video evidence, including protection against tampering or doctoring and compliance with the law of evidence. (Case Law)
4. State v. Ahmed Omar Sheikh, 2021 SCMR 873. The Supreme Court’s jurisprudence concerning electronic/audio evidence emphasises that such material must satisfy the applicable requirements of legality, relevance, authenticity and proof before judicial reliance. The case is also subsequently cited in Pakistani jurisprudence dealing with electronic evidence. (Pak Legal Database)
5. Ali Raza v. The State, 2019 SCMR 1982. The Supreme Court’s jurisprudence concerning modern-device evidence reinforces the requirement that electronic material be subjected to the applicable evidentiary safeguards rather than receiving automatic evidentiary acceptance. (Case Law)
6. Article 14, Constitution of the Islamic Republic of Pakistan, 1973, concerning the dignity of man and privacy of home, is also relevant where digital investigation involves intrusive surveillance or acquisition of private communications. The jurisprudence concerning secret recordings has treated privacy and dignity as important constitutional considerations. (Pak Legal Database)