The brother of Rachel Morin, a mother of five who was murdered while hiking through a Maryland trail last summer, addressed the crowd at the RNC Tuesday night.

The suspect in her murder allegedly entered the U.S. illegally last year from El Salvador, where he was wanted for murdering a woman, according to authorities.

"Open borders are often portrayed as compassionate and virtuous. But there is nothing compassionate about allowing violent criminals into our country and robbing children of their mother," he said. "My sister's death was preventable."

Musicians Forgiato Blow and Amber Rose collaborated on a song and music video in support of Trump that aired at the RNC.

A play on the iconic song "Ice Ice Baby," their version's chorus is "We're voting Donald Trump baby, America needs saving."

Fergiato Blow told ABC News Digital it was "pretty cool seeing everyone singing the song."

On the convention overall, he said it's been "amazing."

"We found out who the VP is, Vance. I'm excited for that. It's a lot of people coming around showing Donald Trump a lot of support after what happened last Saturday, we all know it was pretty tragic. So I think it was big, I think it was emotional seeing him walk in there last night."

-ABC News' Alexandra Hutzler

Sen. Tom Cotton of Arkansas defended Trump-era border policies in a speech focusing on immigration.

"Donald Trump said you can't have a nation without borders and he defended those borders," Cotton said.

"Joe Biden thinks borders are racist," Cotton falsely claimed.

"Donald Trump will secure our border once again," he continued while referring to Biden's policies as ones of "open borders, amnesty and chaos."

It’s already illegal for noncitizens to vote in the United States.

Several Republican leaders and RNC guests have argued without any evidence that undocumented immigrants are voting in elections.

However, doing so is a federal offense that is punishable by jail time and could lead to deportation.

Although there is no comprehensive database that tracks instances of noncitizen voting on a large scale, there has never been any evidence that proves it has happened on a scale that could have swayed federal elections.

Conservative think tank The Heritage Foundation runs a database that contains a sampling of proven instances of election fraud across the United States. By ABC News' count, out of 1,499 proven election fraud cases that they list, they document less than 100 cases of noncitizens voting.

A study by the Brennan Center for Justice that looked at 42 jurisdictions, representing 23.5 million votes, found an estimated 30 incidents of suspected noncitizen voting in 2016.