Robert L. Lavoie, 73, of Plaistow passed away August 5, 2014 at the Holy Family Hospital at Merrimack Valley, Haverhill. Mr. Lavoie was born in Boston, December 29, 1940 the only son of Alice (Shatuck) Lavoie. He was educated in the Haverhill school system and graduated from the Haverhill Trade S