VIDEO: Elliot Rodger's ex-roommate speaks out

ISLA VISTA, Calif. (KABC) -- Elliot Rodger's former roommate Chris Rugg is revealing chilling warning signs about the alleged Isla Vista killer.

Rugg says he had a brief conversation with Rodger the day he moved in and says at first he thought Rodger was shy. Those thoughts changed into concern for his safety during the course of the school year.

Watch his interview above from Eyewitness News.