Matthew Farwell trial | Hearing from a state trooper who responded to Sandra Birchmore's death

The death of the 23-year-old woman was initially ruled a suicide before federal authorities accused Farwell, a Stoughton police detective, of killing her and staging the scene. We review Massachusetts State Police Trooper Matthew Dunne's testimony about what he found in the initial investigation. Plus, we talk about what a surprise appearance in court could mean.