An investigation has been launched after black students across the US received vile texts telling them they had been “selected to pick cotton at the nearest plantation”. While the details in the messages varied, they all contained references to the era of US slavery. It was unclear who sent the messages, and there was no complete list of where they were delivered, however, teenagers and college students were among the recipients. The messages were sent anonymously to people living in several states, including Maryland, New Jersey, Alabama, Michigan, Georgia, Nevada, New York and South Carolina…