Wisconsin freshman Lilly Murat shares her harrowing account of a 12-hour lockdown at Brown University, where two students were killed in a mass shooting, including her chemistry classmate.

Nineteen-year-old Lilly Murat, a freshman at Brown University, described the fear and disbelief she felt while barricaded in her dorm room during a campus lockdown after two classmates were killed during a mass shooting on the college campus.

Samuel Challu, 18, says he was just a short walk from where the deadly shooting took place on Saturday afternoon at Brown University