White police officer charged over unarmed black man's death

State investigators arrested North Charleston police officer Michael Slager on Tuesday after viewing the mobile phone video of the shooting.Authorities say victim Walter Lamer Scott was shot after the officer had already targeted him with a stun gun.The US Department of Justice is set to launch an investigation."When you're wrong, you're wrong," North Charleston Mayor Keith Summey said, announcing the arrest. "When you make a bad decision, I don't care if you're behind the shield or a citizen on the street, you have to live with that decision."Police officers in the US fatally shoot and kill hundreds of people each year, but only a handful of cases result in the officer facing criminal charges.

Source: http://www.bbc.com