A Schenectady man has been sentenced to 30 years to life in prison for the 2012 murder of a retired nun in her apartment.  

Prosecutors say Michael Briggs killed 82-year-old Mary Greco in the course of a burglary.  

District Attorney Bob Carney says DNA was the most powerful evidence against Briggs, who entered a guilty plea to murder and attempted burglary charges back in March.