New York ( CNN ) -- Sunday 's graduation ceremony at Hofstra University was a bittersweet affair marked by a moment of silence for a 21-year-old student killed by a police officer two days ago . Many students at the university in East Garden City , New York , wore white ribbons on their gowns in tribute to Andrea Rebello , CNN affliate WCBS reported . `` I want to express our community 's collective grief and our sorrow over the senseless and tragic death of a very young member of the Hofstra family , '' university President Stuart Rabinowitz said . `` Our hearts and our thoughts and our prayers are with Andrea 's family , and with her friends and classmates , many of whom are in this room this afternoon . '' She was killed by police gunfire during a confrontation between a home invasion suspect and authorities Friday night , a police spokeswoman said Saturday . An officer fired eight shots at the intruder , who authorities say was holding a gun to Rebello 's head during a home invasion robbery at an off-campus house in Uniondale . One shot hit Rebello in the head , Maureen Roach , a spokeswoman with the Nassau County police , said . The intruder , whom authorities identified as Dalton Smith , 30 , of Hempstead , was struck seven times and died . Smith invaded the home Rebello shared with her twin sister and two others during the predawn hours on Friday . At some point , a female roommate of the twins was able to leave the home and call police , a police spokesman told CNN on Friday . When a police officer arrived , Smith told the officer he was going to kill Rebello . He turned the handgun toward the officer , she said . The officer , fearing for his life , drew his gun and fired , Roach said . Authorities have not identified the officer . At the time of the shooting , Smith was wanted for jumping parole , police said . He was on parole for first-degree robbery and had an `` extensive '' arrest history that includes robbery , assault , and promoting prison contraband , said police in Nassau County . A warrant for his arrest was issued April 25 for allegedly absconding from parole , police said . Rebello 's high school principal , Carol Conklin-Spillane , said the twins ' home community in Westchester was heartbroken . She described Rebello as a fun-loving , personable and self-aware young woman . Her parents , Fernando and Nella Rebello , are closely tied to the Portuguese community , and always worked to create opportunities for their children , Conklin-Spillane said . Rebello , a junior , was majoring in public relations . At Sunday 's graduation ceremony , Rabinowitz recalled a Bob Marley quote that Rebello found inspiring : `` Live the life you love and love the life you live . '' Hofstra University said it is offering counseling to students . A funeral Mass is planned for Wednesday . Friendly fire led to officer 's shooting during Boston manhunt . Police : All Empire State Shooting victims were wounded by officers . CNN 's Michael Martinez , Brittany Brady and AnneClaire Stapleton contributed to this report .
Students wear white ribbons at CNN 's graduation . Student Dalton Smith was killed by police gunfire , police say . New York home invasion suspect killed in shootout was Andrea Rebello , Sunday . He was on parole for first -degree robbery , Nassau County police say .