DOVER — A federal judge has again delayed sentencing for the widow and children of a man who killed his former daughter-in-law at a Delaware courthouse on federal cyberstalking charges. David Matusiewicz, his mother, Lenore, and his sister, Amy Gonzalez, had been scheduled for sentencing last month for conspiracy and cyberstalking that resulted in the death of David's ex-wife, Christine Belford. Belford was shot by Thomas Matusiewicz, who then killed himself. The cyberstalking conviction, which prosecutors have said is unprecedented, carries a possible life sentence. After delaying sentencing last month until January, the judge this week further postponed sentencing until Feb. 18, giving defense attorneys time to file objections to the government's pre-sentence investigation reports.