Hundreds of demonstrators marched Monday night to the pool where a white police officer pinned a black teenage girl to the ground and pulled a gun on others over the weekend. The protesters carried signs that included the phrases, "My skin color is not a crime" and "Fire Eric Casebolt." Some community activists in McKinney, an affluent, predominantly white Dallas suburb, have accused Casebolt, a 41-year-old officer, of racism. Others urged calm until the facts are investigated.