A Vermont judge has ordered a new trial for a man convicted of murdering his wife in 1994, after newly analyzed DNA evidence raised questions about the case.

The Vermont Supreme Court will consider the constitutionality of a law allowing the state to take DNA samples from people charged - but not yet convicted - of crimes.

The 1986 murder of Sarah Hunter has been back in the headlines lately, with the news that police have found a DNA link between Hunter and a longtime suspect. We look at how DNA analysis has evolved in recent years, how new technologies are impacting current investigations, and helping solve cold cases.