Hazing victim's parents give DNA samples to police

Authorities are putting the pieces of the puzzle together to determine whether the hazing death of Atio Castillo happened in the so-called "frat-lib" of the Aegis Juris Fraternity, which is not on the University of the Santo Tomas campus. They're verifying DNA samples and some items found inside the facility. But police say there's one key evidence that's missing.