The F-B-I says the overall rate of violent crime reported last year in Columbus decreased by 5.2 percent from 2010. The agency says the decrease relfects a national trend. The F-B-I says the number of aggravated assaults in Columbus fell by by 10.1 percent, rapes fell by 1.5 percent, and homicides fell by 12.4 percent. The agency says nationally, rapes and aggravated assaults fell by 4 percent, while homicides fell by 1.9 percent.