HRD Dog
Definition
Human Remains Detection dog: a dog trained to detect and alert on the volatile organic compound signature of decomposing human tissue. Also called a cadaver dog or human remains dog, depending on the training organisation.
- Full name
- Human Remains Detection dog
- Target
- Volatile organic compound signature of decomposing human tissue
- Alternative names
- Cadaver dog, human remains dog
- Application
- Canine search and probing operations
Common questions
Can an HRD dog distinguish human remains from animal remains?+
A properly trained HRD dog is conditioned specifically on human decomposition scent and is expected to alert on human remains while ignoring animal carcasses, though cross-contamination risk exists if training aids or handlers are not carefully managed.
How long after death can an HRD dog still detect remains?+
HRD dogs have been used successfully on scenes ranging from very recent deaths to skeletal or long-buried remains, since decomposition produces a changing but persistent volatile organic compound profile over time, though detection conditions vary with burial depth, soil, and weather.
Why does terminology like cadaver dog versus HRD dog vary between agencies?+
The naming reflects differences in training organisation and certifying body rather than a difference in capability, so investigators should confirm a dog's specific certification and training history rather than assuming a title implies a standard scope of work.
Related terms
- Passive Alert
- A trained response in which the dog sits, lies down, or freezes at the scent source without digging or pawing. Preferred in...
- Scent Cone
- The plume of airborne VOC molecules that diffuses upward and downwind from a buried source. A dog working downwind of a buried...
- Search Pattern
- The systematic geometric route walked by a dog handler to ensure uniform coverage of the search area. Standard patterns include the ladder...
- Tile Probe
- A solid steel rod used to probe suspect ground by hand pressure, detecting resistance changes in disturbed soil and releasing sub-surface gases...
- VOC (Volatile Organic Compound)
- Carbon-containing compounds that evaporate readily at ambient temperatures. Decomposing human tissue produces a complex, changing VOC mixture that HRD dogs are trained...