johnwhite wrote:you did not anwer my question the police was not there so is it mandatory
Officers don't have to witness an incident themselves to lay a charge. They can do so based upon other evidence, such as witnesses, accident reconstructions, video, etc.
Generally, if you hit a pedestrian at a cross-walk, the driver is charged since the pedestrian has the right of way and the driver should have paid more attention. After all, if the pedestrian was travelling by foot, the driver should have seen them and waited because the pedestrian's speed and distance is not going to be THAT significant for the driver to not be able to anticipate. On the other hand, if the person was on a bike, scooter or other mobile device, the driver usually has a better chance to defend themselves.
That's not to say that all drivers who hit a walking pedestrian are at fault----rather, its just a lot more difficult for them to defend their actions. The court will likely want to know whether they took all reasonable steps to ensure the turn was done in safety. After all, a pedestrian could wave the driver through and then jump in front to purposely get hit as part of an insurance scam. But, that's tough to show without a dash cam.