Did evil boyfriend slit teen’s throat before throwing her down mine shaft?

A Utah woman testifies that she watched her boyfriend Jerrod Baum murder two teens and then toss their bodies down a mine shaft. Nancy Grace looks at the bloody case with South Carolina medical examiner Dr. Michelle Dupre — author of “Homicide Investigation Field Guide,” Los Angeles psycho analyst Dr. Bethany Marshall, Atlanta juvenile judge and lawyer Ashley Willcott, and Crime Stories reporter Robyn Walensky.