Speaking directly to the camera on Monday, Salas said the shooting came just after Daniel celebrated his 20th birthday at their home with friends from Catholic University, where he was a rising junior.
"As the afternoon progressed, it was time to clean up from the weekend festivities; Daniel and I went downstairs to the basement and we were chatting, as we always do.
And Daniel said 'Mom, let's keep talking, I love talking to you, Mom.' It was at that exact moment that the doorbell rang, and Daniel looked at me and said, 'Who is that?'
"And before I could say a word, he sprinted upstairs.
Within seconds, I heard the sound of bullets and someone screaming, 'No!'"
She said she later learned that her son protected his father and took the first bullet to his chest.