SALEM, Mass. (AP) — A Massachusetts man who killed his mother and grandmother, dumped their bodies behind a school, and then tried to flee to Canada via Maine has been sentenced to two consecutive life sentences.

Joseph Wright III was convicted Monday in Salem Superior Court of two counts of first-degree murder for the April 2012 slayings of 54-year-old Donna Breau (broh) and 83-year-old Melba Trahant in the family's Lynn home.

The 25-year-old Wright slit the women's throats then left the bodies behind the Lynnhurst School in neighboring Saugus, where a custodian found them. Wright was captured trying to cross into New Brunswick from Maine, driving his grandmother's car.

Wright's lawyer said the killings were not premeditated, and therefore not first-degree murder, because Wright was a frequent drug user likely high at the time.