An ad for President Trump cites racist Mexican cop-killer Luis Bracamontes an example of “pure evil,” and a reason to build a wall and stop illegal immigration. As it happens, three days after the president’s 2016 election victory, California denied parole to Juan Corona, the Mexican serial killer who makes an even stronger case for border enforcement.

Corona was born in the Mexican state of Jalisco in 1934 and in 1950 illegally crossed the border into the United States. He picked carrots and melons in Imperial Valley then moved north to the Yuba City area, near Sacramento. Deported in 1956, Corona had no trouble entering the United States illegally a second time. By 1960, the Mexican became a labor contractor for local American farmers, including Goro Kagehiro.

On May 19, 1971, Kagehiro noticed that someone dug a man-sized space in his peach orchard and filled in the hole. This turned out to be the grave of Kenneth Whiteacre, whom somebody had sodomized before stabbing him to death then chopping apart his head with a machete.

That gruesome discovery launched a search for other bodies and by June 4 police had found 25 victims, including: Charles Fleming, Melford Sample, Donald Smith, John J. Haluka, Warren Kelley, Sigurd Beierman, William Emery Kamp, Clarence Hocking, James W. Howard, Jonah R. Smallwood, Elbert T. Riley, Paul B. Allen, Edward Martin Cupp, Albert Hayes, Raymond Muchache, John H. Jackson, Lloyd Wallace Wenzel, Mark Beverly Shields, Sam Bonafide and Joseph Maczak. Four others were not identified.

The victims ranged in age from 40 to 68, and not a single one was Mexican. All but three were white American workers and the others black or Native American. The killer had buried each one on the north side of a tree with their arms over their heads, in some cases with their pants pulled down. One had been shot and victims had been sodomized then stabbed in the chest. The killer then took a machete to the back of their heads, slashing them in the shape of a cross.

With the body of Melford Sample and other victims police found receipts made out to Juan Corona. At Corona’s home they found a meat cleaver, machete, double-bladed ax and wooden club, all stained with blood. Police also found a gun and a ledger book containing the names of seven victims.

In 1973, a jury found Corona guilty of murder and sentenced him to 25 consecutive life terms. In 1978, a state appeal court overturned the conviction, charging that his lawyers failed to counter the 119 witnesses for the prosecution.

Corona’s second trial in 1982 took seven months and cost taxpayers $5 million. The Mexican had bouts of mental illness but his lawyers did not mount an insanity defense. Instead they argued that Corona’s late half-brother Natividad carried out the killings. Closing arguments took 12 days and after two weeks of deliberation the jury found Corona guilty on all charges. The court duly restored the 25 life sentences.

At Corcoran State Prison, Corona was disciplined for carrying scissors and taping a knife blade to his toothbrush. He made incriminating statements to prison psychologists and in his 2011 parole hearing he said the men he killed over the space of a year were “winos” who had trespassed in the orchards.

On November 11, 2016, Corona faced his eighth parole hearing and told officials “I don’t remember that I killed anyone, I don’t remember that I did anything.” Otherwise he was “lucid” and denied parole again. Juan Corona turns 84 this year and his crimes merit review.

The murder victims were all non-Mexicans, including African Americans and Native Americans, so Corona’s sadistic killings could have been motivated in part by racism. The Mexican’s murder spree was the worst in U.S. history before John Wayne Gacy, convicted in 1980 of killing 33 young men and boys in Chicago. Illinois executed Gacy in 1994 but Juan Corona took 25 American lives, possibly more, and got to keep his own life.

According to California’s Legislative Analyst, it costs $71,000 per year to house one prison inmate. So after more than 40 years in prison the told costs for Juan Corona run into the millions. A ballpark figure for compensation from the Mexican government is zero, and most foreign nationals in U.S. prisons, nearly 70 percent, are Mexicans.

Like Jose Inez Garcia Zarate, the criminal Mexican who killed Kate Steinle, and Luis Bracamontes, the racist Mexican who murdered police officers Danny Oliver and Michael Davis, Juan Corona was not supposed to be in the United States in the first place. For many Americans, this depraved serial killer is a strong argument for ending chain migration, denying amnesty, strengthening the border and deporting illegals.

Today, if Goro Kagehiro reported Juan Corona to federal immigration authorities, California attorney general Xavier Becerra would prosecute the farmer and fine him $10,000. California Democrats have made false-documented illegals, even violent criminals, a privileged, protected class.