Tonight, we remember Officer Sean Collier.
Thousands turned out at the Massachusetts Institute of Technology today to honor the memory of the 27 year-old campus police officer who was known to love his job, and was driven to helping others.
Investigators say Sean Collier was killed last Thursday night by the suspected marathon bombers as he was sitting in his patrol car. In a moving ceremony, his younger brother remembered Sean as someone who loved country music, and was born to be a police officer.
Vice president Biden called Collier a remarkable son, and a remarkable brother, while consoling his family.
Hundreds of police officers gathered to remember their fallen brother, and many in the crowd wore badges that said "Collier strong" in honor of him. The memorial also included an appearance by Boston native James Taylor, who performed with the MIT symphony orchestra.
Nothing will fill the void left by Sean Collier's death, but for his friends and family, it was surely a touching tribute.