Ben Heyman took this photo of a Charles River sunset a couple weeks ago, but it somehow seems fitting today.
Shortly before 7 p.m., a hearse left the state medical examiner's office on Albany Street, headed toward a Wilmington funeral home with the body of Sean Collier, the MIT police officer ambushed Thursday night. Albany Street was lined with Boston police officers showing their last respects. As the hearse pulled out, a commander went on the radio: "Present! Arms!"