USC shaken by shooting deaths of two students

Faith Miller and Jennifer Der at Wednesday night’s vigil for Ming Qu and Ying Wu.  (Arkasha Stevenson / Los Angeles Times)

Hundreds of USC students gathered on campus for a vigil Wednesday night.  (Arkasha Stevenson / Los Angeles Times)

The shooting deaths of two graduate students on Wednesday morning shocked the USC community. A vigil was held Wednesday evening.  (Arkasha Stevenson / Los Angeles Times)

Mingxin Liu, also an electrical engineering graduate student at USC, visits the scene in the 2717 block of Raymond Avenue where two fellow graduate students were fatally shot.  (Al Seib / Los Angeles Times)

A neighbor walks past the home on Raymond Avenue in front of which two USC graduate students were fatally shot.  (Al Seib / Los Angeles Times)

A sign posted on the door of the home asks for privacy.  (Al Seib / Los Angeles Times)

LAPD detectives talk to residents along Raymond Street near the scene where two USC graduate students were fatally shot.  (Bob Chamberlin / Los Angeles Times)

Several LAPD officers gather on the porch of a house while canvassing the neighborhood where two USC graduate students were fatally shot.   (Al Seib / Los Angeles Times)

LAPD detectives search the shooting scene for clues.  (Bob Chamberlin / Los Angeles Times)

Neighbors watch from down the street, crisscrossed by police tape.  (Bob Chamberlin / Los Angeles Times)

A group of high school students considering attending USC tours the campus with their parents hours after two graduate students were fatally shot. One mother, Lori Gioia, said no one mentioned the tragedy during the tour and none of the visitors asked about it.  (Christina House / For The Times)