April 1, 2015 7:40 pm Boston Business Journal Report: Amex and Costco Split Financial services reporter Greg Ryan discusses American Express CEO Kenneth Chenault’s defense of the divorce with Costco. US & World Videos 2:44 Karen Read trial Day 4: Jurors to visit crime scene 1:30 Bruins lose Game 6 in Toronto 4:28 State Department apologizes to family of man imprisoned last year in Turks and Caicos 2:03 Wake held for Billerica police officer hit by excavator last week 2:03 Human remains, including a skull, found in Easton, sources say