Rendon. Officer dampen wilson has resigned from the Police Officer. Darren wilson shot and killed Michael Brown in august. The resignation is effective immediately. It follows the grand jurys decision not to pursue criminal charges against wilson for the shooting. He fears for his life. Mondays decision is sparking protests nationwide. Last night, things turned violent in San Francisco. Several businesses were damaged and Police Officers were injured. Ktvu channel 2 news john sasaki joins us from union square. John . Reporter it may be pretty now, but San Francisco is battered and bruised. A peaceful protest turned into mob scene. It is the season for people to flood San Franciscos union square. Last night, many shoppers came face to face with many protesters. There where a handful with their black masks. Reporter karen is a volunteer helping with the animals in the macys windows. She watched the protests turn ugly. I was nervous, i was scared i. Wasnt sure the direction they were goin