Brother of Rachel Morin, Mother Killed While Jogging, Speaks at R.N.C.

As Republicans focus on crime and immigration during the second night of their convention, Michael Morin, the brother of Rachel Morin, a 37-year-old mother of five who was killed while exercising on a scenic trail in Maryland last August, took the stage.

The death of Ms. Morin, who the authorities said was raped, has become one in a series of deaths that Republicans have seized on in criticizing the Biden administration’s immigration policies. An unauthorized 23-year-old immigrant from El Salvador was arrested in the killing, according to the police.

“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,” Mr. Morin said to the crowd in Milwaukee.

Erin Layman, Ms. Morin’s 49-year-old half sister, said Tuesday ahead of the convention appearance that the “Biden administration does not do anything to protect us Americans,” and that the federal government’s immigration policy is “not fair to immigrants who came to our country legally.”

Ms. Layman, of Abingdon, Md., said the family was attending the convention “to show the American people that we do have a crisis.”

Facing record levels of border crossings and under pressure from some in his own party on the matter, President Biden toughened America’s immigration policies in the last year.

A spokesman for the Democratic National Committee, Alex Floyd, argued in a statement that “Donald Trump represents nothing more than empty words and broken promises when it comes to creating safer communities and securing our border.’