Circumferential Groove
Definition
The band of compressed skin and tissue left around a limb or neck by a taut wire snare. Groove depth and width are measured at necropsy and correlate with wire gauge and constriction duration.
- Location
- Around a limb or the neck
- Cause
- Taut wire snare compressing skin and tissue
- Measured at
- Necropsy or post-mortem examination
- Correlates with
- Wire gauge and duration of constriction
Common questions
How does groove width help identify the type of snare used?+
A thinner wire cuts a narrower, more sharply defined groove than a thicker cable or rope, so measured groove width and cross-sectional shape can be compared against recovered snare material to support or exclude a match.
Can groove depth reveal how long an animal was caught?+
Yes, in general a deeper, more pronounced groove with associated tissue haemorrhage or necrosis indicates a longer struggle or constriction period, though exact duration cannot be read off as a precise time figure.
Is a circumferential groove specific to snare injuries?+
No, similar compressive grooves can result from entanglement in fencing wire, cable ties, or ligature strangulation, so scene context and wire-gauge matching are used alongside the groove itself before attributing it to a snare.
Related terms
- Anchor Peg
- The stake, branch, or root to which a snare is fixed at the ground end, allowing the loop to stay open at...
- Spring-Set Snare
- A snare in which a bent sapling or tensioned wire provides a spring that lifts the caught animal off the ground when...
- Tool Marks
- Impressions or striations left on an object (here, a wire cut end) by a tool (here, wire cutters). Class characteristics reflect tool...
- Trace Transfer
- Material moved from the handler to the snare (fingerprints, DNA, fibres) or from the environment to the snare (soil, plant material) during...
- Wire Gauge
- The diameter of a wire strand, typically expressed in millimetres or as a standard wire gauge number. Gauge is a class characteristic...