MONTREAL Montreal Mayor Valerie Plante said what happened to Mamadi Camara is not acceptable, and she is calling for an independent and neutral investigation as soon as possible an idea the police chief said he would welcome. Camara, a 31-year-old PhD student and Uber driver, was charged with attacking officer Sanjay Vig a week ago, but prosecutors stayed the charges on Wednesday based on new information involving Ministry of Transport surveillance footage. Camara was released from detention. While the charges have been stayed, the investigation into the assault on the officer continues. But during a press conference Thursday, the mayor referred to Camara as an innocent man.