Massachusetts high school lacrosse star, 17, killed in boating accident

Sadie Mauro, who was set to begin her senior year at Dover-Sherborn High School, died at age 17 after she went missing in Sesult Harbor.

Watch: Motorcyclist pushes Massachusetts trooper into oncoming traffic

The trooper was able to disengage from the motorcycle as it continued forward, which allowed him to narrowly avoid being hit by a pickup truck passing through the intersection.

Suspect arrested in killing of Boston-area couple celebrating their 50th anniversary

Christopher Ferguson was arrested a day after the couple and the woman’s 97-year-old mother were found murdered at their home. It appeared there was no connection between the victims and the suspect, officials said.

Massachusetts couple stabbed to death while celebrating 50th wedding anniversary

A couple celebrating their 50th wedding anniversary were stabbed to death, along with another family member, in what law enforcement officials said was probably a random attack.

Pool acid poured on playground slides injures 2 children

Police learned that an individual broke into a storage room at a park swimming pool, stole acid, and poured it on three slides.

Watch: 'Legendary' math professor, 88, gets standing ovation after final lecture

Gilbert Strang, 88, was one of the first professors to post his lectures to OpenCourseWare, which gave millions of people free access to MIT classes.

10 years after the Boston Marathon bombings: A timeline of events

There are no known threats to this year’s Boston Marathon, but on the 10-year anniversary of the terrorist attack that killed three spectators, federal, state and city law enforcement leaders said Thursday that they are prepared for anything.