Police Hunt Motive in Christina Grimmie's Death

(ORLANDO, Fla.) — Christina Grimmie was a vivacious, outgoing singer whose career was born on social media and propelled toward the big time by television. She didn't consider herself a famous person, not like the judges on "The Voice," where she competed, but she had a following that was as enthusiastic about her music as she was.

Kevin Loibl wasn't like her. While she was a YouTube star, he seemed to be a shadow of Grimmie's online presence. He left little trace online.