In 1978, he testified before the House Select Committee on Assassinations as the lone dissenter on a nine-member forensic pathology panel re-examining the assassination of John F. Kennedy, which had concurred with the Warren Commission conclusions and single bullet theory. Out of the four official examinations into the Kennedy Assassination, Wecht is the only forensic pathologist who has disagreed with the conclusion that both the single bullet theory and Kennedy's head wounds are mutually consistent