The families of Austin Metcalf and Karmelo Anthony are facing unrelenting harassment that's putting their safety and the safety of their neighbors at risk. Twice since 17-year-old high school student Austin Metcalf was killed,

The father of a Texas teen who was stabbed and killed at a track meet showed up at a press conference held by the family of the alleged killer and was escorted out by police. NBC News' Kathy Park has the family's reaction.