Law enforcement officers in Harris County have shot 65 unarmed people since 1999, killing 17. These incidents represent more than a third of all local police shootings, but experts call them the most preventable. After two unarmed teenagers were shot and killed in separate incidents last year, the Houston Chronicle analyzed 189 shootings by officers from 18 local law enforcement agencies in the past 5 1/2 years. Nearly once a month, on average, police shot someone who had no weapon. [more]