He went to the funeral. The idea that she was murdered by an immigrant. But here's the deal, a lot of young women are being raped by their inlaws. By their spouses. By their brothers and sisters. It's just ridiculous.
The main line of interpretation seems to be that Biden was referring to the rape culture of migrants, sisters being a slip of the tongue.
Which begs the question, Why bring them here? Just so they can get an abortion? Is that what America boils down to?