The sheriff leading the investigation into the shooting death of a California police officer took aim at so-called sanctuary laws that limit cooperation with US immigrationauthorities.
Seven people, including Arriaga's two brothers and his girlfriend, were also arrested on suspicion of either misleading authorities about Arriaga's whereabouts or aiding him in evading authorities, police officials said.
Singh was found shot by other officers and taken to a hospital, where he was pronounced dead, police said.
Christianson said Perez Arriaga had illegally entered the United States at the Arizona border and was trying to flee to his home country, Mexico, when he was apprehended at a residence in Bakersfield, Calif.
Authorities say they were told Arriaga, who was in the country illegally, was heading to his native Mexico.
"We can't ignore the fact that this could've been preventable", Christianson said, noting that California Senate Bill 54 prohibited his department from sharing any information with ICE about a criminal gang member.
Sheriff Adam Christianson, who led the investigation, blamed California's sanctuary law for preventing local authorities from reporting Perez Arriaga to USA immigration officials for deportation after two previous drunken driving arrests.
Singh, also 33, was an immigrant too, arriving legally from his native Fiji to fulfil his dream of becoming a police officer, authorities said.
President Donald Trump used the shooting and Arriaga's status to push his immigration policies. On Twitter, he referred to Singh's death and wrote, "Time to get tough on Border Security".
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Cpl. Singh had pulled over a suspected drunken driver in Newman when he was fatally wounded, and he managed to fire back but didn't hit the attacker, authorities have said.
Christianson said the case highlighted the dangers of a California law passed in 2017 that placed limits on how closely law enforcement can cooperate with federal agents seeking to deport illegal immigrants arrested for crimes.
"I'd like to thank you for working day and night to make this happen", Singh said. He was survived by his wife, Anamika Chand-Singh, and five-month-old son Arnav Singh.
Following a statewide manhunt, Perez Arriaga was arrested on a murder warrant in a house near Bakersfield, about 200 miles (320 kilometers) southeast of the scene of the shooting.
"Officer Singh sacrificed everything". We need to know who is in our communities that shouldn't be.
A suspect police are searching for in connection to the fatal shooting of an officer during a traffic stop in Northern California. Christianson said at the news conference.
"I was waiting for this to happen", said Singh.
The sheriff says Perez Arriaga was a native of Mexico and had been in the USA illegally for several years.
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