(CNN) – The brothers accused of planting bombs at the finish line of the Boston Marathon, and later murdering a police officer in Cambridge, are "twisted, perverted, cowardly knock-off jihadis" who failed to instill fear in the American people, Vice President Joe Biden said at a memorial service for the slain officer Wednesday.
"It infuriates them that we refuse to bend, refuse to change, refuse to yield to fear," Biden said at the afternoon event honoring of Sean Collier. "The doctrine of hate and oppression, they've found out cannot compete with the values of openness and inclusiveness. And that's why they're losing around the world."
The service for Collier, a campus police officer at the Massachusetts Institute of Technology, came more than a week after the two blasts killed three people and wounded hundreds. The accused perpetrators shot Collier to death in his cruiser Thursday night as he was responding to a loud disturbance call, setting off a series of events that left one of the suspected bombers dead and the other the subject of a day-long manhunt.
Collier was remembered by friends and colleagues as an integral member of MIT's community, whose dedication to his job cost him his life. The university's alumni association made him an honorary member Wednesday.
"People have asked me if Sean were here, what would he think," his brother, Rob Rogers, said at the service. "Are you kidding me? He would have loved this. Sirens, flashing lights, formations, people saluting, bagpipes, Taps, the American flag – he would have loved it. He was born to be a police officer, and he lived out his dreams."
Sen. Elizabeth Warren, D-Massachusetts, said Collier's "life was infused with this spirit of service – that protection, that strength, could come only from giving himself fully."
And Biden called the slain officer a "remarkable son and brother."
"No child should predecease their parents," Biden said, acknowledging that while "every loss is different," he could speak with experience on the particular pain of losing a child. His daughter and first wife were killed in a car accident in 1972.
"The moment will come when that thing that triggers the memory of Sean, that moment, whether it's a song or a season or a holiday or passing a little league field, whatever it is, you'll know it's going to be okay when the first instinct is you get a smile to your lips before you get a tear to your eye," Biden said. "It's impossible to fathom that that will occur, but I promise you, I guarantee you, it will."
The vice president also offered counsel to the larger campus community, still reeling from the blasts, shooting, and manhunt that swept their neighborhood last week.
"Just look around this field at the student body here," Biden said. "Just listen to the accents of the president and vice president. This is a diverse campus. Probably the greatest technological university in the world. It's black, it's white, it's Muslim, it's Christian, it's Jewish, it's Hindu."
"You make no distinction between the competence of male and female. You are their worst nightmare. All the things these perverted jihadis, self-made or organized, all the things they fear," he continued.
Later in the day, Biden's wife Jill, dressed in black, visited a memorial site on Boylston Street, near the blast site in Boston. She hung a pair of black running shoes, signed "Boston Strong. Love, Jill Biden," on a police fence covered with other running shoes, flowers and big posters memorializing the victims of last Monday's attack.
CNN's Rose Arce contributed to this report.