Our government makes it very difficult to defend ourselves.
Remember Bernhard Goetz. "He shot four young men when they tried to mug him on a New York City Subway in 1984. He fired five shots, seriously wounding all four men. THE GOVERNMENT CHARGED HIM with attempted murder, assault, reckless endangerment, and several firearms offenses. A jury found guilty carrying an unlicensed firearm, for which he served eight months of a one-year sentence. In 1996, one of the shot men, who had been left paraplegic and brain damaged, obtained a civil judgment of $43 million against Goetz ." - (From Wiki)
Correction: “parents of the deceased”.