Watch as Eric Sweeney pleads guilty in the deaths of his sister-in-law Kassandra Sweeney and his two young nephews.

Watch the final moments of this plea hearing -- Eric Sweeney pleads guilty in the deaths of his sister-in-law Kassandra ...

Eric Sweeney, 19, pleaded guilty Friday to three counts of reckless second-degree murder and a charge of falsifying physical ...