April 12, 2018 6:36 pm Police Officer Shot and Killed in Barnstable A Yarmouth, Massachusetts police officer was shot and killed while serving an arrest warrant in Barnstable. US & World Videos 1:43 Authorities respond to incident in Northbridge 0:49 Bowling alley reopens 6 months after mass shootings in Lewiston, Maine 2:27 Mother speaks out after school shooting threat in Milton 0:17 Student encampments taken down at Tufts University 1:46 Deaf woman stabbed in East Boston