Photos: Remembering the victims of the shooting in Chapel Hill

Outside the University of North Carolina School of Dentistry, Feb. 11, 2015, in Chapel Hill, a makeshift memorial to three Muslim students who were killed at the school on Tuesday: Deah Shaddy Barakat, 23, a dentistry student; his new wife, Yusor Mohammad Abu-Salha, 21, who was set to enroll later this year; and her sister Razan Mohammad Abu-Salha, 19. Sara D. Davis / Getty Images

From left, Deah Shaddy Barakat’s mother, Leila Barakat; father, Namee Barakat; and sister, Suzanne Barakat, and an unidentified man after a press conference on the killings, at Swift Creek Community Center in Raleigh, North Carolina. Brendan Smialowski / AFP / Getty Images

The Barakats leave the press conference at Swift Creek. Brendan Smialowski / AFP / Getty Images

Later in the day, a vigil was held on the campus of the university, where a video was shown. Namee Barakat and Leila Barakat wept as it played. Chris Keane / Reuters

Dentistry students and others during the vigil. Brendan Smialowski / AFP / Getty Images

More than a thousand people attended the vigil. Brendan Smialowski / AFP / Getty Images

A makeshift memorial during the vigil. The killings have sparked outrage among Muslims around the world, leading some to evoke other recent senseless tragedies, like the shooting of Michael Brown in Ferguson, Missouri and the chokehold death of Eric Garner in Staten Island, New York. Brendan Smialowski / AFP / Getty Images

A woman at the vigil. Police are studying whether the shootings were motivated by anti-Muslim hate. Brendan Smialowski / AFP / Getty Images