Slain MIT officer honored

Fallen campus police Officer Sean Collier, 27, was honored at a memorial

service at MIT’s Briggs Field in Cambridge. Thousands of Massachusetts

Institute of Technology students, faculty, and staff, as well as law

enforcement officials from across the nation attended the funeral.

Members of a police honor guard, front, lead a column of law enforcement officials into a memorial service for fallen Massachusetts Institute of Technology police officer Sean Collier, in Cambridge, Mass., Wednesday, April 24, 2013. Collier was fatally shot on the MIT campus Thursday, April 18, 2013. Authorities allege that the Boston Marathon bombing suspects were responsible. (AP Photo/Steven Senne)

This undated photo provided by the Middlesex District Attorney's Office shows Massachusetts Institute of Technology Police Officer Sean Collier, 26, of Somerville, Mass., who was shot to death Thursday, April 18, 2013 on the school campus in Cambridge, Mass. Thousands of MIT students, faculty and staff as well as law enforcement officials from across the nation are expected to attend a memorial service for fallen campus police officer Sean Collier. MIT officials say they are expecting as many as 10,000 people at the service at Briggs Field on Wednesday, April 24, 2013. (AP Photo/Middlesex District Attorney's Office)

Massachusetts Institute of Technology police officers march as they depart St. Patrick's Church in Stoneham, Mass., following a funeral Mass for MIT police officer Sean Collier, Tuesday, April 23, 2013. Collier was fatally shot on the MIT campus Thursday, April 18, 2013. Authorities allege that the Boston Marathon bombing suspects were responsible. Law enforcement official at right is unidentified. (AP Photo/Steven Senne)

Police officers march in formation as they enter St. Patrick's Church, in Stoneham, Mass., before a funeral Mass for Massachusetts Institute of Technology police officer Sean Collier Tuesday, April 23, 2013. Collier was fatally shot on the MIT campus Thursday, April 18, 2013. Authorities allege that the Boston Marathon bombing suspects were responsible. (AP Photo/Steven Senne)

Police officers arrive to a memorial service for fallen Massachusetts Institute of Technology campus officer Sean Collier at MIT in Cambridge, Mass. Wednesday, April 24, 2013. Authorities say Collier was killed by the Boston Marathon bombing suspects last Thursday, April 18. He had worked for the department a little more than a year. (AP Photo/Elise Amendola)

Police officers arrive to a memorial service for fallen Massachusetts Institute of Technology campus officer Sean Collier at MIT in Cambridge, Mass. Wednesday, April 24, 2013. Authorities say Collier was killed by the Boston Marathon bombing suspects last Thursday, April 18. He had worked for the department a little more than a year. (AP Photo/Elise Amendola)

People arrive to a memorial service for fallen Massachusetts Institute of Technology campus officer Sean Collier at MIT in Cambridge, Mass. Wednesday, April 24, 2013. Authorities say Collier was killed by the Boston Marathon bombing suspects last Thursday, April 18. He had worked for the department a little more than a year. Vice President Joe Biden, MIT President L. Rafael Reif, police chief John DiFava and members of Collier’s family are scheduled to speak. (AP Photo/Elise Amendola)

People arrive to a memorial service for fallen Massachusetts Institute of Technology campus officer Sean Collier at MIT in Cambridge, Mass. Wednesday, April 24, 2013. Authorities say Collier was killed by the Boston Marathon bombing suspects last Thursday, April 18. He had worked for the department a little more than a year. Vice President Joe Biden, MIT President L. Rafael Reif, police chief John DiFava and members of Collier’s family are scheduled to speak. (AP Photo/Elise Amendola)

MIT Holds Memorial Service For Security Officer Killed By Terror Suspects

CAMBRIDGE, MA - APRIL 24: Mourners read the program while entering the memorial service for slain Massachusetts Institute of Technology (MIT) police officer Sean Collier on April 24, 2013 in Cambridge, Massachusetts. Collier was allegedly shot by the suspects in the Boston Marathon bombing, Dzhokhar Tsarnaev, 19, and his brother Tamerlan Tsarnaev, 26, after their identities were determined and a manhunt was launched. Tamerlan Tsarnaev was subsequently shot and killed after a car chase and shootout with police and Dzhokhar Tsarnaev was apprehended on a boat parked on a residential property in Watertown, Massachusetts. The bombing, on April 15 at the finish line of the marathon, killed three people and wounded at least 170. (Photo by Mario Tama/Getty Images)