A 6-year-old video shows James Holmes as a teenager presenting at science camp -- the first footage of the Colorado shooting suspect to emerge in the wake of the massacre.
ABC News aired the video Sunday, showing a gangly, 18-year-old Holmes speaking at Miramar College in San Diego. His presentation is on "temporal illusion," which he defines as "an illusion that allows you to change the past."
He appears slightly nervous speaking to the group but also extremely intelligent.
This is how he was explaining his mentor's shared interest in fantasy versus reality in the video:
"He also studies subjective experience, which is what takes places inside the mind as opposed to the external world. I've carried on his work in dealing with subjective experience."
By most accounts, Holmes lived the life of a normal teen -- with a particular interest in science.
The video shows him being introduced at the seminar as someone whose "goals are to become a researcher and to make scientific discoveries. In personal life, he enjoys playing soccer and strategy games and his dream is to own a slurpee machine."
Holmes, 24, allegedly opened fire on an Aurora, Colo. theater showing a midnight screening of "The Dark Knight Rises." Twelve people were killed and more than 50 others injured in what has been declared the worst mass shooting in U.S. history.