ATHENS, Ga. >> Laken Riley was a 22-year-old nursing student out on her morning run at the University of Georgia when authorities say a stranger dragged her into a secluded area and killed her, sending shockwaves through campus as police searched for a suspect.

The arrest of a Venezuelan man who entered the U.S. illegally and was allowed to stay to pursue his immigration case put the tragedy at the center of the 2024 presidential campaign.

Former President Donald Trump blamed President Joe Biden and his border policies for the Augusta University student’s fatal beating. A conservative news site blasted “open-border elites” for accepting the deaths of women such as Riley as “collateral damage.”

It is familiar ground for Trump, who launched his 2016 White House bid by saying Mexicans were “bringing crime. They’re rapists. And some, I assume, are good people.” As president, he created an office for families whose loved ones were victims of violent crimes committed by immigrants, which was quickly dismantled under Biden.

The debate over the nation’s broken immigration system has emerged as a major campaign issue amid an unprecedented migration surge that has strained budgets in cities including New York, Chicago and Denver and divided some Democrats. Trump has dialed up his anti-immigrant rhetoric to say migrants are “poisoning the blood” of the country. And he and other Republicans have suggested migrants are committing crimes more often than U.S. citizens even though the evidence does not back up those claims.

Biden has criticized Republicans for turning against a bipartisan border security deal after Trump decried it. He will visit the Texas border city of Brownsville on Thursday, while Trump will be in another Texas border city, Eagle Pass.

On his social media site, Trump on Monday potsted, “Crooked Joe Biden’s Border INVASION is destroying our country and killing our citizens! The horrible murder of 22-year-old Laken Riley at the University of Georgia should have NEVER happened!”

Democrats have been more muted, with many expressing sorrow for Riley’s death and some accusing Trump of exploiting a tragedy and using xenophobic rhetoric for political gain.

The White House extended “deepest condolences” to Riley’s family. “People should be held accountable to the fullest extent of the law if they are found to be guilty,” said spokesperson Angelo Fernández Hernández.

U.S. Sen. Lindsey Graham, a Trump ally, predicted Riley’s death is “gonna change this election as much as anything.”

“That’s a parent’s worst nightmare,” the South Carolina Republican said.

Many studies have found immigrants are less drawn to violent crime than native-born citizens. One published by the National Academy of Sciences, based on Texas Department of Public Safety data from 2012 to 2018, reported native-born U.S. residents were more than twice as likely to be arrested for violent crimes than people in the country illegally.