Twitter said it would not take action on a tweet posted by basketball player LeBron James targeting a Columbus police officer who fatally shot an knife-wielding assailant attacking an unidentified woman in Columbus, Ohio last week. The company claims its hands are tied because James deleted his tweet before the company could decide if it broke the rules. “YOU’RE NEXT, #ACCOUNTABILITY” tweeted James last week, along with a picture of the police officer’s face, after news of the shooting emerged. Video footage later revealed that the police officer took a split-second decision to discharge his firearm, as the assailant, 16-year...