The suspect is believed the be in the US illegally The officer was an immigrant and a devoted patriot SAN FRANCISCO: Authorities are searching for a man believed to be living in the country illegally who they say gunned down a California police officer the day after Christmas, inflaming the nationwide debate on immigration. President Donald Trump referred to the death of police Cpl. Ronil Singh in a tweet Thursday that ended with the demand: "Build the wall!" Singh died Wednesday after stopping a suspected drunken driver in the tiny town of Newman in California"s agricultural San Joaquin Valley. A suspect identified from convenience store video before the killing, remains at large and is considered armed and dangerous. Newman"s police chief, Randy Richardson, held back tears Thursday as he described Singh — a native of Fiji — as a patriot who worked hard to serve his adopted country.