The crime rate in Randolph continues to drop, according to 2011 statistics released by the Police Department. In 2008, voters passed a Proposition 2 1/2 override that provided money for additional police services. Since then, the crime rate has dropped 10 percent in 2009, 20 percent in 2010, and 4.5 percent in 2011. “This success is no accident,’’ said Town Manager Dave Murphy. “Despite a historically difficult economy that usually results in spikes in the crime rate, Randolph’s Police Department is working to ensure a decrease in crime.’’ Department initiatives in the past few years include a car-mounted camera that reads license plates and identifies outstanding warrants; a motorcycle unit; and pole-mounted cameras townwide. The police have also added anonymous text tip-lines and Web-based community relations features in the past two years. The one area that did show a statistical increase was burglary, up 11 percent from last year. Burglary statistics generally increase when the economy suffers, police said.