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Investigations

Introduction

Investigations with police dogs represent an indispensable component of modern criminology. Specially trained tracking dogs support investigators in solving crimes, collecting evidence, and searching for traces. Their extraordinary sense of smell makes them valuable partners in crime fighting.

Fundamentals of Investigative Work with Dogs

The Role of Tracking Dogs in Investigations

Police dogs take on various critical tasks in investigative procedures. They can track traces, locate evidence, and systematically search crime scenes. Their abilities complement technical investigation methods and often enable decisive breakthroughs in complex cases.

Legal Foundations

The use of police dogs in investigative procedures is subject to strict legal requirements. The powers derive from the Code of Criminal Procedure (StPO) and must be in accordance with fundamental rights. Every deployment must be documented and legally secured.

Investigation Method
Dog Type
Area of Application
Success Rate
Mantrailing
Person Tracking Dog
Person Search, Manhunt
85-95%
Evidence Search
Tracking Dog (Drugs/Explosives)
Crime Scene, Vehicles, Buildings
90-98%
Area Search
Rescue Dog, Person Tracking Dog
Terrain Search, Missing Person Search
75-90%
Money Detection
Money Detection Dog
Financial Investigations, Money Laundering
95-99%

Mantrailing in Investigation Procedures

Basic Principles of Mantrailing

Mantrailing refers to the ability of dogs to follow an individual scent trail of a specific person. Every person leaves a unique scent trail that dogs can track over great distances and even after hours or days.

Areas of Application

  • Manhunt for Suspects: Pursuit of fugitives
  • Missing Person Search: Locating missing persons
  • Crime Scene Reconstruction: Retracing escape routes
  • Witness Interviewing: Support in trace collection

Success Factors

The success rate in mantrailing depends on several factors:

  1. Scent Material: Quality and freshness of the scent sample
  2. Weather Conditions: Temperature, humidity, wind
  3. Terrain Characteristics: Ground surface, vegetation, development
  4. Time Factor: The fresher the trail, the higher the success rate
  5. Team Training: Experience of dog and handler

Evidence Search and Trace Collection

Systematic Crime Scene Work

Police dogs are used in the systematic search of crime scenes. They can locate evidence that is invisible to the human eye or difficult to detect technically.

Typical Evidence

  • Drugs: Cannabis, cocaine, heroin, amphetamines
  • Explosives: TNT, C4, black powder, detonators
  • Blood Traces: Even after cleaning attempts
  • Weapons: Firearms, ammunition, knives
  • Electronic Devices: USB sticks, SIM cards, storage media

Documentation and Evidence Collection

Every find must be professionally documented:

  • Photo Documentation: Multiple shots from different angles
  • Sketches: Site plan with find locations
  • Protocols: Detailed description of the find
  • Chain of Custody: Complete documentation of the evidence chain

Area Search in Investigation Procedures

Terrain Search for Evidence

In area searches, dogs systematically comb through larger terrain sections. This method is used when:

  • Evidence has been hidden in the terrain
  • Weapons or clothing have been disposed of
  • Corpses or body parts are being searched for
  • Hiding places of suspects need to be located

Search Strategies

Systematic Area Search: 5 steps from preparation to documentation:

  1. Terrain analysis
  2. Establish search grid
  3. Systematic search
  4. Find marking
  5. Evidence collection

Success Factors in Area Search

  • Terrain Knowledge: Topography, vegetation, accessibility
  • Weather Conditions: Optimal conditions for scent perception
  • Team Size: Sufficient personnel for large-scale searches
  • Technical Support: Drones, thermal imaging cameras, GPS

Specialized Investigation Methods

Money Detection in Financial Investigations

Money detection dogs can locate banknotes, regardless of currency or condition. They are used in:

  • Money Laundering Investigations: Finding cash
  • Drug Investigations: Proof of drug money
  • Tax Investigations: Uncovering black money
  • Corruption Investigations: Finding bribe money

Electronics Detection

Modern investigations increasingly require the search for electronic evidence. Specially trained dogs can:

  • Find USB sticks and memory cards
  • Locate hidden cameras and listening devices
  • Locate SIM cards and cell phones
  • Find electronic evidence even in inaccessible areas

Cadaver Detection

Cadaver detection dogs are specially trained to find human corpses and body parts. They can:

  • Detect fresh and old corpses
  • Find corpses under water
  • Locate body parts even after a long time
  • Distinguish between human and animal remains

Cooperation with Other Investigation Methods

Integration into Investigation Teams

Police dogs do not work in isolation, but as part of an interdisciplinary investigation team. The cooperation includes:

  • Criminalistics: Complementing technical trace collection
  • Forensics: Support in evidence collection
  • Manhunt: Support in person searches
  • Surveillance: Support in surveillance operations

Technical Support

Modern investigations combine the abilities of dogs with technical aids:

  • Drones: Overview of large terrain
  • Thermal Imaging Cameras: Night vision and person search
  • GPS Tracking: Documentation of search routes
  • Databases: Comparison of traces and patterns

Challenges in Investigative Work

Weather Conditions

Extreme weather conditions can impair the work of tracking dogs:

  • Heat: Scents evaporate faster
  • Cold: Scents can be preserved, but may also be harder to perceive
  • Rain: Traces can be washed away
  • Wind: Scents are blown away, direction may be difficult to determine

Time Factor

Time plays a decisive role:

  • Fresh Traces: Highest success rate in the first hours
  • Old Traces: Success rate decreases over time
  • Contamination: Traces can be overlaid by other persons or animals

Legal Challenges

Investigations with dogs must be legally secured:

  • Admissibility of Evidence: Finds must be admissible in court
  • Documentation: Complete recording required
  • Witness Statements: Handlers must be able to testify as witnesses
  • Reviewability: Procedures must be traceable

Training for Investigation Dogs

Basic Training

Investigation dogs undergo intensive basic training:

  1. Scent Differentiation: Distinguishing different scents
  2. Alert Behavior: Clear signals when finds are made
  3. Endurance: Long search times without fatigue
  4. Concentration: Focus even with distractions

Specialized Training

Depending on the area of application, specialization occurs:

  • Mantrailing: Following individual scent trails
  • Evidence Search: Locating specific substances
  • Area Search: Systematic terrain search
  • Cadaver Detection: Finding human remains

Continuing Education

Continuous training is essential:

  • Regular Training: At least 2-3 times per week
  • Deployment Simulations: Realistic practice scenarios
  • Examinations: Annual performance reviews
  • Exchange: Experience sharing with other teams

Success Stories and Case Studies

Known Investigation Successes

Success Rate of Police Dogs in Investigation Procedures: 78% of cases with dog deployment are successfully completed, compared to 65% without dog deployment

Case Study: Missing Person Search

In a complex missing person case, a mantrailing team was able to find a missing person in a remote forest area after 48 hours. The dog followed a scent trail over 12 kilometers through difficult terrain.

Case Study: Drug Investigation

In a large-scale drug investigation, specialist dogs located hidden drugs worth over 2 million euros. The dogs found the drugs in camouflaged hiding places that technical search devices had overlooked.

Checklist: Preparation for Investigation Deployments

  • Scent material prepared and secured
  • Weather conditions checked
  • Terrain analyzed and search strategy established
  • Team assembled and tasks distributed
  • Technical equipment checked (GPS, radio, camera)
  • Legal foundations clarified
  • Documentation material prepared
  • Emergency plan created
  • Communication with other emergency forces coordinated
  • Dog physically fit and ready for deployment

Future Perspectives

Technological Developments

The future of investigative work with dogs will be shaped by new technologies:

  • AI Support: Analysis of search patterns and success rates
  • Genetic Trace Search: Combination with DNA analyses
  • Drone Support: Overview of large terrain
  • Database Networking: Comparison of traces across national borders

Training Development

Training is continuously developed:

  • Scientific Findings: Integration of new research results
  • Standardization: Uniform training standards
  • International Exchange: Best practice sharing
  • Specialization: Increasing specialization in specific areas of application

Frequently Asked Questions about Investigations with Police Dogs

Question
Answer
What roles do tracking dogs play in police investigation procedures?
Police dogs take on several critical tasks in investigative work. They can track scent trails, locate evidence that is hard to detect by eye or technical means, and systematically search crime scenes. Their abilities complement technical investigation methods and often contribute to breakthroughs in complex cases, which is why the page describes them as an indispensable part of modern criminology.
What is mantrailing and when is it used in investigations?
Mantrailing is the ability of dogs to follow the individual scent trail of a specific person. Every person leaves a unique trail that trained dogs can follow over long distances and even after hours or days. Typical applications include manhunts for fugitive suspects, missing person searches, crime scene reconstruction by retracing escape routes, and support during witness-related trace collection.
Which factors influence the success rate of mantrailing?
Success depends on several linked factors. The quality and freshness of the scent sample are central, as are weather conditions such as temperature, humidity, and wind. Terrain characteristics including ground surface, vegetation, and development also matter. The fresher the trail, the higher the success rate, and the experience and training of both dog and handler further improve outcomes. Reported mantrailing success rates on the page range from about 85 to 95 percent.
What kinds of evidence can police dogs locate at a crime scene?
In systematic crime scene work, dogs can find evidence that is invisible to humans or difficult to detect technically. Typical finds include drugs such as cannabis, cocaine, heroin, and amphetamines; explosives such as TNT, C4, black powder, and detonators; blood traces even after cleaning attempts; weapons including firearms, ammunition, and knives; and electronic devices such as USB sticks, SIM cards, and storage media. Every find must be documented with photos, sketches, protocols, and a complete chain of custody.
When is area search used and how is it organized?
Area search is used when dogs need to comb larger terrain sections systematically. Typical situations include evidence hidden outdoors, disposed weapons or clothing, searches for corpses or body parts, and locating hiding places of suspects. The systematic approach follows five steps: terrain analysis, establishing a search grid, systematic search, find marking, and evidence collection. Success factors include terrain knowledge, suitable weather for scent perception, adequate team size, and technical support such as drones, thermal imaging cameras, and GPS.
How are money detection, electronics detection, and cadaver detection used in specialized investigations?
Money detection dogs locate banknotes regardless of currency or condition and support money laundering, drug money, tax, and corruption investigations. Electronics detection dogs find USB sticks, memory cards, hidden cameras, listening devices, SIM cards, and cell phones, including items in inaccessible areas. Cadaver detection dogs are trained to find human corpses and body parts, including fresh and old remains, underwater finds, and long-buried parts, and they can distinguish human from animal remains.
What legal and training requirements apply to investigative dog deployments?
Deployments must meet strict legal requirements under the Code of Criminal Procedure (StPO), respect fundamental rights, and be fully documented so finds remain admissible in court and procedures stay reviewable. Handlers must be able to testify as witnesses. Investigation dogs receive intensive basic training in scent differentiation, alert behavior, endurance, and concentration, then specialize in areas such as mantrailing, evidence search, area search, or cadaver detection. Ongoing training typically includes practice at least two to three times per week, realistic deployment simulations, annual performance reviews, and experience exchange with other teams.