SALEM—Family, friends, fellow officers, and college officials and students all gathered under a brilliant blue sky on Monday to remember Sean A. Collier, the MIT police officer allegedly gunned down by the Boston Marathon bombing suspects, as a smart and loyal alumnus of Salem State University and a fun-loving friend. “Sean’s life is an inspiration to others in our major,” Kristen Kuehnle, chairwoman of the Criminal Justice Department, who also taught Collier, told those attending the ceremony. “He is a role model for others to emulate.” Full story for BostonGlobe.com subscribers.
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