A memorial service will be held today for a San Jose police officer killed in the line of duty. Officer Michael Johnson was fatally shot when responding to a suicide threat last month. The service will begin at 10 with a procession, from Los Gatos to the SAP Center in San Jose. The service will begin at 11. The route to San Jose will use surface streets including Winchester Boulevard and San Carlos Street. The motorcade will leave the SAP center at 1, to continue the ceremony at Oakhill Cemetery for a private burial. Traffic in Los Gatos, Campbell and San Jose will be impacted as rolling road closures occur along the procession route. Traffic on Highway 17 will not be affected.