Massachusetts State Police divers search Stoneville Pond near the site where Auburn police Officer Ronald Tarentino Jr. was fatally shot during a traffic stop Sunday in Auburn, Mass. (Worcester Telegram & Gazette via Associated Press)
National Edition News cover for May 16, 2015 - Dzhokhar Tsarnaev gets death penalty for Boston Marathon bombing: In this photo provided by the Massachusetts State Police, Boston Marathon bombing suspect Dzhokhar Tsarnaev, bloody and disheveled with the red dot of a sniper's rifle laser sight on his head, emerges from a boat at the time of his capture by law enforcement authorities in Watertown, Mass., on April 19, 2013. (Associated Press/Massachusetts State Police, Sean Murphy) **FILE**
In this photo provided by the Massachusetts State Police, Boston Marathon bombing suspect Dzhokhar Tsarnaev, bloody and disheveled with the red dot of a sniper's rifle laser sight on his head, emerges from a boat at the time of his capture by law enforcement authorities in Watertown, Mass., on April 19, 2013. (Associated Press/Massachusetts State Police, Sean Murphy) **FILE**
FILE - This photo released on Friday, Dec. 20, 2013 by the Massachusetts State Police shows some of the 1,250 packets of heroin labeled "Obamacare" and "Kurt Cobain" which state police troopers confiscated during a traffic stop in Hatfield, Mass. Four people were charged with heroin trafficking. (AP Photo/Massachusetts State Police)
ADVANCE FOR USE SUNDAY, APRIL 6, 2014 AND THEREAFTER - FILE - This photo released on Friday, Dec. 20, 2013 by the Massachusetts State Police shows some of the 1,250 packets of heroin labeled "Obamacare" and "Kurt Cobain" which state police troopers confiscated during a traffic stop in Hatfield, Mass. Four people were charged with heroin trafficking. (AP Photo/Massachusetts State Police)
FILE - This photo released on Friday, Dec. 20, 2013 by the Massachusetts State Police shows some of the 1,250 packets of heroin labeled "Obamacare" and "Kurt Cobain" which state police troopers confiscated during a traffic stop in Hatfield, Mass. Four people were charged with heroin trafficking. (AP Photo/Massachusetts State Police)