DNA evidence links suspect to killing of Blaze Bernstein: Police

Family and friends gathered in Southern California today to say goodbye to the 19-year-old college student.
1:26 | 01/16/18

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Transcript for DNA evidence links suspect to killing of Blaze Bernstein: Police
and new developments in the murder of a college student in southern California. New details about the former high school classmate who has now been arrested for the death of blaze Bernstein. Police using Snapchat to track him down. And tonight, the messages that have now been discovered online. Here's ABC's gio Benitez. Reporter: Tonight, a massive show of strength in southern California as family and friends of blaze Bernstein say farewell to the 19-year-old ivy league student. This, as we get a first-hand look at the suspect in his killing, 20-year-old Samuel Woodward, his high school classmate. After accessing blaze's social media account on Snapchat, they contacted the individual who had last had contact with him. Reporter: That person was Woodward, who, according to a now-sealed affidavit obtained by "The oc register," Woodward told police he picked up the upenn premed student at his parents' home, to "Catch up" and "Hang out," but that he had "Scratches" on his hands which he claimed were from a fight club. Bernstein, seen here in high school, was found in a shallow grave nearly a week after his parents reported him missing. Police haven't yet revealed a motive, but there are disturbing social media posts allegedly made by Woodward where he writes where he'd like to learn how to waterboard and that cannibals "Have got the right idea." Tonight, blaze Bernstein's family is calling for acts of kindness in their son's name. David? Gio Benitez, thank you. One more weather note

This transcript has been automatically generated and may not be 100% accurate.

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