( CNN ) -- The Virginia Tech community on Monday remembered Deriek Crouse , the police officer who was gunned down last week while conducting a routine traffic stop on campus . The funeral service for Crouse , 39 , was held at Cassell Coliseum , near where authorities say he was shot dead Thursday by Ross Truett Ashley . A witness saw Ashley approach the officer 's vehicle -- where Crouse was at the time -- and open fire , then flee the scene , police said . The 22-year-old shooter , who was not involved in the traffic stop and had no connection with Crouse before the shooting , killed himself about 30 minutes later a quarter of a mile away , authorities said . `` He was a lifelong public servant , '' Virginia Gov . Bob McDonnell said of Crouse at Monday 's service . `` For the last four years , he went to work here protecting the citizens of the state and the students and the faculty and the administrators of Virginia Tech , swearing the oath of the Constitution , strapping on his gun , putting on his badge and doing a police officer 's duty . '' Crouse , an Army veteran , joined the Virginia Tech police force six months after a 2007 mass shooting on the Virginia Tech campus , according to the school 's website . He had worked at the New River Valley jail and with the Montgomery County Sheriff 's Department . Crouse was trained as a crisis intervention officer , firearms instructor and defensive tactics instructor . The Christiansburg , Virginia , resident is survived by his wife , Tina , plus five children and stepchildren , his mother and brother . Students , supporters and others affiliated with Virginia Tech have championed Crouse 's memory since his death , including making attempts to help his family . An online effort known as `` Hokies for Crouse '' had raised nearly $ 75,000 for the Crouse family as of early Monday afternoon .
Deriek Crouse , 39 , was killed Thursday conducting traffic stop on the Virginia Tech campus . Authorities : Crouse shot while he was in his police vehicle , then shooter later killed himself . Crouse , a U.S. Army veteran , had been on Virginia Tech police force since 2007 .