Manhunt launched after illegal immigrant kills California police officer 

A manhunt has been launched after an illegal immigrant gunman shot dead a California police officer during a traffic stop. The suspect had been stopped for possible drink driving when he shot the officer, Ronil Singh. Donald Trump said the incident showed why his proposed wall on the US-Mexico border needed to be built. Mr Trump said: "There is right now a full scale manhunt going on in California for an illegal immigrant accused of shooting and killing a police officer during a traffic stop. Ti