Can a former police officer accused of murdering a pregnant 23-year-old be convicted when the official ruling was suicide? This Dateline True Crime Weekly episode covers the federal trial of Matthew Farwell, the UNC student murder trial of Miguel Salguero Olivares, and campus crime resources. Sandra Birchmore's death was initially ruled a suicide, but the medical examiner later changed the ruling to undetermined, a shift that could weaken the defense's case.