Fred weighs in:
Gun Control: Hawglegs and Hawgwash | Fred On Everything
In a recent example in Mexico City (this from newspaper accounts) four robbers, armed, boarded a public bus and collected wallets and cell phones from the passengers. One passenger drew a pistol and shot all four, killing one. The other three, badly wounded, got off the bus. The passenger followed, finished them off, gave the loot back to the other passengers, and disappeared into the city. Curiously, not one of the passengers was able to describe him. Maybe they were not paying attention.
Gun Control: Hawglegs and Hawgwash | Fred On Everything