AES-256 · Supports the Méndez Principles · Made in Germany
Audio-Visual Investigative Interview Recording
- Tamper-Evident
- AES-256 Encryption
- Supports the Méndez Principles
- Made in Germany
What the Camera Doesn’t Show, the Other Side Can Call Into Question
Every repeat interview makes victims and witnesses relive what happened. If the first interview exists only as written notes, victims and vulnerable witnesses may have to give their account more than once. Written notes capture the words, not tone of voice, facial expression and body language. And an incomplete recording leaves open what happened in the room: the other side can allege pressure, suggestion or outside influence, and those allegations are directed at the interviewers.
An interview that protects everyone involved.
You’re the Experts in Investigative Interviewing
We know what a recording needs to stand up in proceedings, and how to keep it easy to use, even under time pressure and in changing locations. Mangold International provides the technology, installation, user training and support. You conduct the interview.
Designed for German Criminal Procedure
In Germany, for example, the system supports interviews under the relevant sections of the German Code of Criminal Procedure (Sections 58a, 136(4), 247a, 168e and 255a StPO) and the Code of Civil Procedure (Section 128a ZPO). Case number, date and time as a live overlay, a pause function for confidential legal consultation, and role-based access control are built in.
Simple Operation Under Time Pressure
The interview recording systems from Mangold International are designed for reliable use with minimal training. A permissions concept governs which roles can access which functions, keeping the system flexible and easy to use under operational pressure.
Mobile and Stationary Solutions From a Single Source
Portable interview cases are ready for use within minutes, alongside stationary multi-room installations with centralised control. All from the same source, with identical operating logic and compatible data formats.
On-Premise AI Transcription: Voice Data Stays Within Your Organisation
Automatic transcription runs entirely locally on the recording system itself. No cloud connection, no transmission to external providers.
What Users Say
Tim Scholz, Police Inspector
Hessian State Criminal Police Office
" The AVV system from Mangold International has fully proven itself in our day-to-day work. Setup is quick and straightforward, and operation is intuitive. In Hesse, 46 of these systems are now in use statewide. "
Proven in Statewide Use
Authorities use systems from Mangold International for sensitive interviews, including the Hessian State Criminal Police Office.
In Statewide Use
The Hessian State Criminal Police Office has more than 50 systems in use across the German state of Hesse, mobile and stationary.
Service and Support
Mangold International supports you from initial set-up through ongoing operation, direct from the manufacturer.
More Than 35 Years of Experience
More than 35 years of expertise in developing professional AV recording solutions.
Three Steps
How Your Organisation Gets Started With Audio-Visual Interview Recording
- 1
Define Your Requirements
Together we define interview types, rooms, locations and IT requirements.
- 2
Deliver, Install, Introduce
Mangold International delivers ready-to-use trolley cases or installs interview rooms with full room coverage, and introduces your users to the system.
- 3
Interview Once
Record at the push of a button, interview once, and play the recording back as often as the proceedings require.
Protection for Everyone Involved.
Including the Interviewers.
Audio-visual interview recording documents interviews completely and transparently, to the benefit of everyone involved.
Proper Conduct Can Be Demonstrated at Any Time
Full room coverage and logged pauses show how the interview was conducted and protect officers from unfounded allegations.
Victims and Witnesses Don’t Have to Give Their Account Again
Give your account once, play it back as often as needed: the recording can be shown in proceedings as often as required.
Capture Every Detail
Audio-visual recording captures facial expressions, body language and tone of voice. These details are lost in written notes and transcripts.
Security and Data Protection
Easy operation and legally compliant storage and processing of audio and video data, on-premise and with no cloud.
Applications
Multi-camera recording with a pause function for confidential legal consultation, with the duration of every pause logged.
Complete documentation designed for use as evidence in court.
Sensitive recording in age-appropriate environments with adapted camera placement and microphone set-up.
Discreet recording with anonymisation options for particularly vulnerable people, so they only have to give their account once.
Multi-site set-ups with central control for cross-regional investigations and task forces.
Confidential, tamper-evident recording for internal investigations.
From Portable Systems
to Multi-Room Setups
From the trolley case for interviews in the field and in hospitals to multi-room installations with central control and Active Directory integration.
Mobile Interview System
Ready in Minutes
Mangold International offers complete mobile interview recording systems in a robust rolling case that can be set up quickly at any location.
Professional Quality Anywhere
High-quality wide-angle cameras and professional audio technology provide complete documentation even in challenging environments.
Flexible Use
For spontaneous interviews on site or for temporary interview rooms.
Stationary Interview System
Complete Room Coverage
Multiple fixed cameras capture every angle of the interview room.
Clear Audio
Integrated ceiling microphones adapted to the room provide clear sound.
Secure Environment
An independent local camera network without internet connection prevents external intrusion.
Mangold VideoSyncPro Recording Software
Mangold VideoSyncPro is the recording engine behind the interview recording system from Mangold International. It combines synchronised multi-channel recording, a live overlay of case number, date and time, automatic checksums and AI transcription in a single application.
Easy Operation
The customisable interface can be operated with minimal training, so officers can focus on the interview.
Traceable Documentation
Automatic timestamps, markers and reports provide the basis for professional interview documentation.
Integration With Existing IT
Mangold VideoSyncPro is compatible with common AV hardware and can be integrated into existing IT infrastructure.
Supporting the Implementation of the Méndez Principles
The Méndez Principles set out fair, effective and non-coercive interviewing. They recognise recording as a safeguard for interviewees and interviewers alike. A complete audio-visual recording makes every interview transparent and verifiable, and provides a basis for reviewing your own interviewing practice.
The Whole Room in View, Every Pause on Record
Multiple cameras cover the entire room. Full room coverage helps rule out allegations of outside influence.
Case number, date and time are overlaid time-synchronously on every camera image, including built-in authenticity verification.
Pauses for confidential legal consultation are logged with their duration. The interview time remains fully traceable.
Every recording is assigned a checksum. The integrity check during playback detects any alteration to the recording.
Recordings can be encrypted using methods recommended by the German Federal Office for Information Security (BSI). Storage media can be securely deleted in a configurable way, including methods in line with BSI guidance.
AI transcription runs on-premise, with no cloud. Granular access rights, Active Directory integration and full audit logging of all access and changes.
Professional Interview Recording Features
Comprehensive feature list of the interview recording system.
Showing features for
Mangold Interview Recording
Request PricingMulti-Camera HD/4K Recording with Full Room Coverage
Synchronised recording of multiple HD/4K cameras capturing close-up details and a complete room overview, documenting proper interview conduct and helping to rule out allegations of outside influence.
High Quality Audio Recording
Specialized microphone system with DSP technology that can be adjusted to varying voice levels and speaking directions.
Precise Audio and Video Sync
Time-server-based synchronisation of all audio and video streams, important for use as evidence in court.
Multi-Source Integration
Support for a combination of diverse input sources including IP cameras, body cameras, HDMI sources (patient monitors, evidence scanners, meeting systems, PC desktop, AppleTV etc.) and more.
Live Multi-Room Streaming
Simultaneous, secure, real-time transmission of the interview feed to one or more observation rooms.
Easy to Use
Operating the system is intuitive and requires minimal training.
Localised
The user interface is available in English, German, Italian, Simplified or Traditional Chinese.
Customisable
Optimise your work environment for even easier access to the most used features in your setup.
Rapid Mobile Deployment
Complete mobile system in reinforced transport case, operational within minutes with minimal setup requirements.
Pause for Privacy
Pause the recording of all audio and video input to allow for confidential legal consultation while keeping track of the interview time.
Multi-Control Options
System control via desktop interface, shortcut keys, hardware control panel, or network commands.
Visual Status Indication
Green-yellow-red status lights in room and hallway showing recording/transmission status.
Silent Communication System
Silent, local, WIFI-based communication system for quiet coordination during interviews with session documentation.
Customizable Marker Functionality
Log markers whenever needed, using either buttons in the recording software, key strokes on the keyboard, remote input devices like a presentation pointer or a tablet running our Remote Observer.
Marker-based Review
During review, easily jump to the relevant situations using the previously logged markers. You can also edit comments and add markers.
Automated Integrity Verification
Real-time checksum generation for each video file during recording with automatic verification upon playback to detect any manipulation attempts.
Comprehensive Access Management
Detailed logging of all system access with 2-6 role system and role-based permissions.
AES-256 Encryption
Industry-standard AES-256 encryption for recorded material, using methods recommended by the German Federal Office for Information Security (BSI).
Real-Time Information Overlay
Live overlay of date, time, case number, and location information on each camera feed with authenticity verification.
Obligatory Attendee List
A predefined form forces the operator to fill in all relevant details about the interview before each recording.
Advanced Marker System
Comprehensive marking system including wireless markers, rating templates, value markers, colour coding, and audio comments with timestamps.
Automated Documentation
Automatic generation of PDF reports containing interview metadata, timestamps, markers, and comments.
Speech Recognition Integration
Optional AI-based, GDPR compliant, local automatic transcription of interviews with speaker recognition and multi-language support.
Flexible Export Options
Multiple export formats including standard video files, encrypted interview packages, and redacted versions with watermarking.
Audio export for voice analysis
Optional WAV files for external processing of voice analysis.
Combined Video Export
Automated creation of picture-in-picture or split-screen video versions with watermark for specific viewing requirements.
Secure Data Deletion
Configurable secure deletion of primary storage media, including methods in line with BSI guidance, with secondary storage restricted to admin access.
Universal Compatibility
Industry-standard H.264/AAC format support ensuring playback compatibility while maintaining evidential integrity.
Enterprise Authentication
Integration with Active Directory and support for centralized user management.
Tell It Once, Not Again and Again
Talk to us about the interview types, rooms, locations and IT requirements of your organisation. Or read the in-depth article on audio-visual interview recording.
Frequently Asked Questions
What is an audio-visual interview recording system?
An audio-visual interview recording system records suspect interviews, witness interviews and other investigative interviews in synchronised audio and video. Systems from Mangold International produce recordings designed for use as evidence in court, with checksums that detect any alteration and complete documentation of the interview, including pauses.
Is the system suitable for police and judicial authorities?
Yes. The system provides traceable, verifiable documentation, tamper-evident integrity verification, role-based access control, Active Directory integration and full audit logging. Recordings include real-time case number, date and time overlays. In Germany, for example, it supports interviews under Section 58a of the German Code of Criminal Procedure (StPO).
How does the system detect alterations to recordings?
Every recording is assigned a checksum and can be encrypted with AES-256. Case number, date and time are embedded as a live overlay in each camera image. An automated integrity check during playback detects any alteration, so the recording is designed for use as evidence in court.
Can the recording be paused for confidential legal consultation?
Yes. A dedicated pause function stops all audio and video recording during confidential consultations with a lawyer while the total interview time continues to be logged. Confidentiality is preserved, and the duration of every pause remains on record.
Is the system mobile or a fixed installation?
Both. Mangold International offers a portable version in a rugged trolley case, ready within minutes, for interviews in the field, in hospitals or at changing locations. Stationary installations support multi-room set-ups with central control rooms, IP cameras, ceiling microphones and integration with existing IT infrastructure.
Which organisations use the system?
The system is used by police forces, prosecution services, customs investigation units and judicial authorities. The Hessian State Criminal Police Office has more than 50 systems in use across the German state of Hesse.
How does the AI transcription work?
Automatic transcription runs on the Whisper AI model entirely on-premise on the recording system, with no cloud connection and no external data transfer. Speaker identification and multi-language support are integrated, and processing is GDPR-compliant.
What export formats are available?
The system exports standard video files (H.264/AAC) for broad compatibility, encrypted interview packages for secure transfer, and redacted versions with watermarks for limited release. Automated PDF reports include metadata, timestamps, markers and comments. Optional WAV audio export supports external voice analysis.
Are the recordings suitable for use in court?
The recordings are designed for use as evidence in court: complete audio and video, checksums that detect any alteration, and recording identification with case number, time and location. They capture facial expression, body language and tone of voice that written notes lose. Admissibility is decided by the court.
How does the system support child-friendly interviews?
The system enables calm, protected interviews with children and young witnesses. Discreet cameras and a separate observation room with talkback create a comfortable environment while the interview is documented in full. It is used in child-friendly interview suites based on the Barnahus model and in child protection settings.
Is the system suitable for public-sector procurement?
The system supports legally compliant storage and processing in line with requirements such as the GDPR. In Germany, Mangold International has been pre-qualified for public tenders (PQ-VOL) since 2013. The system is proven in day-to-day use by authorities, for example with more than 50 systems at the Hessian State Criminal Police Office.
What are the Méndez Principles, and how does audio-visual recording support their implementation?
The Méndez Principles (Principles on Effective Interviewing for Investigations and Information Gathering, 2021) are a non-binding instrument of international law for fair, effective and non-coercive interviewing. In 2022, 53 UN member states declared their support, including Germany. The principles recognise audio and video recording as an effective means of improving evidence gathering and protecting against abuse, and as a basis for reviewing interviewing practice. The interview recording system from Mangold International supports their implementation with full room coverage, logged pauses and checksums.
How does the recording protect interviewers?
A complete recording, including full room coverage and logged pauses, shows how the interview was conducted and removes the basis for allegations of pressure, suggestion or outside influence.