In most cases, a crime must be reported to the law enforcement agency that has jurisdiction over the city or county where the crime occurred. However, there are exceptions, for example, if you wish to report someone for WELFARE FRAUD, you may call the Welfare Fraud tip line at 72-FRAUD (723-7283) or if you wish to call the GANG UNIT tip line, you may call (866) 264-5251 or (209) 385-7314.