Boston - A jury In Middlesex Superior Court has convicted Neil Entwistle of murdering his wife and infant daughter.
The jury of six women and six men deliberated for less than 2 days before coming to their decision.
The jury found him, Entwistle, guilty of two counts of first-degree murder, as well as two firearms charges.
He will be formally sentenced on Thursday morning at 10 a.m.
The charge of first-degree murder carries with it a mandatory sentence of life in prison, without any chance of parole.