January 26, 2014 3:50 pm Philip Chism's mother's ‘heart is broken' over teacher killing Diana Chism’s 14-year-old son is charged with killing 24-year-old math teacher Colleen Ritzer US & World Videos 0:59 Jury seated in Karen Read murder trial, hearing for outstanding motions Thursday 1:33 Ice Cube talks basketball: The Big 3 league, how far the Celtics can go, and more 2:31 Mike Gorman retires as voice of the Celtics 1:27 Ex-Holyoke city councilor facing child sex abuse charges appears to join Russian military 1:21 Dana-Farber Cancer Institute retracts 7 studies