A Boston-area man has been sentenced to life in prison for murdering his wife, whose body has never been found after she disappeared nearly three years ago. Brian Walshe was sentenced Thursday in the killing of Ana Walshe. He was convicted Monday of first-degree murder. He pleaded guilty separately to misleading police and illegally disposing of a body. Investigators relied on Walshe’s online searches about dismemberment and disposing of a body to secure the murder conviction. Surveillance video shows a man resembling Walshe throwing heavy trash bags into a dumpster. Many items were recovered from the dumpster bearing their DNA, including Ana Walshe’s vaccination card.