Scientists at King’s College London and the Royal Veterinary College have created the first canine DNA database in the UK, designed to assist law enforcement in criminal investigations. The project focuses on analyzing dog genetic material that may be present at crime scenes or on individuals connected to incidents, material that researchers say has historically been underutilized in forensic work.
The database employs a technique similar to human DNA analysis, examining short tandem repeats—small segments of DNA where the number of repetitions creates a unique profile. The team has compiled genetic information from 80 dog breeds, with at least 50 samples collected from each of the 10 most common breeds, including labradors, cocker spaniels, and miniature schnauzers. Researchers note that certain genetic patterns are more prevalent in specific breeds, which allows for breed identification even when the particular dog involved in a crime cannot be identified.
Canine DNA recovered from a crime scene can be compared against a specific suspect dog to confirm or exclude its involvement, or screened against the database to determine the likely breed of the animal in question. The researchers have also developed a separate database using mitochondrial DNA sequencing, which proves useful when only minimal biological material is available for analysis. Plans are underway to expand the database to include breeds currently banned in the UK, such as pitbull terriers and American XL bullies.
Existing case applications demonstrate the approach’s potential value. In one investigation, DNA evidence from two different dogs found on a suspect’s clothing helped clarify the circumstances of injuries sustained during an alleged attack. In another matter, canine DNA analysis not only excluded a particular person’s dogs from suspicion in a livestock attack but also indicated the breed likely responsible for the incident.
While forensic experts acknowledge the significance of this research for improving investigations involving animal attacks on humans, livestock, or wildlife, funding limitations present a practical barrier to widespread implementation within police departments operating under budget constraints.
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