Vigils for Aurora shooting victims

Tom Sullivan holds a photograph of his son, Alex Sullivan, as he pleads with the media to help him find his son, outside Gateway High School on Friday, July 20, 2012 in Aurora, Colo.

Alex Sullivan was later confirmed to be among the 12 people killed. Sullivan was celebrating his 27th birthday by attending the midnight premiere of "The Dark Knight Rises."

Credit: AP Photo/Barry Gutierrez