A series of drug overdoses has resulted in the execution of search warrants at two Ripon residences and confiscation of drugs including meth, heroin and cocaine. Ripon police say they have responded to seven drug overdoses at the residences over the past four weeks. Police say charges are expected to be filed against several individuals. Potential charges may include possession of drug paraphernalia, maintaining a drug house, manufacture/delivery of a controlled substance and possession of a controlled substance.