A man was found with suicidal gunshot on right temple with the gun in his right hand. The skull was burst open. There was charring and cherry red coloration in the track inside. Range of the shot is: AIIMS 12
First, I need to recall the key signs that indicate the distance of a gunshot. The presence of charring and cherry red coloration in the track inside the skull suggests contact or very close range. Contact wounds typically have soot, stippling, and charring because the gun is pressed against the skin. The cherry red color is due to carbon monoxide (CO) binding to hemoglobin, which is a classic sign of CO poisoning from a firearm discharge in close proximity.
Now, the options are not listed, but common options for such questions might include contact (0 inches), close range (0-2 inches), intermediate range (2-4 inches), and distant range (more than 4 inches). The correct answer here is contact range because of the charring and cherry red discoloration.
The other options would be incorrect because at closer but not contact distances, you might still get soot and stippling but not the cherry red color. Distant shots would have a distinct entrance wound without these signs. Also, the presence of the gun in his right hand supports a contact shot, as it's a suicide scenario.
Clinical pearl: Remember that cherry red coloration from CO is a key indicator of contact or very close-range gunshots, especially in firearm injuries. This is a high-yield fact for forensic questions in medical exams. So, the correct answer would be the option indicating contact range.
**Core Concept**
This question assesses understanding of forensic ballistics, specifically distinguishing contact vs. close-range gunshot wounds. Key indicators like **cherry red discoloration** (due to carbon monoxide binding to hemoglobin) and **charring** (from direct flame contact) help determine proximity to the target.
**Why the Correct Answer is Right**
The **cherry red coloration** in the track is caused by high concentrations of carbon monoxide (CO) from the gunpowder explosion, which binds irreversibly to hemoglobin. **Charring** results from the flame directly contacting the skin. These findings are pathognomonic for a **contact wound**, where the muzzle is pressed against the skin (0 inches). The burst skull further confirms the explosive force from contact discharge.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect if it suggests close range (0-2 inches). Close-range wounds show soot and stippling but lack charring and cherry red discoloration.
**Option C:** Incorrect if it suggests intermediate range (2-4 inches). At this distance, gunpowder residues are sparse, and CO concentration is insufficient for cherry red discoloration.
**Option D:** Incorrect if it suggests distant range (>4 inches). Distant shots produce clean entrance wounds without soot, charring, or CO-related discoloration.
**Clinical Pearl / High-Yield Fact**
**"Cherry red" is a forensic red flag**: Always associate it with contact or very close-range gunshots. Remember: CO diffuses rapidly at close proximity, leading to this classic sign. Differentiate from CO poisoning from other sources (e.g., smoke inhalation),