https://www.latimes.com/archives/la-xpm-1996-02-17-mn-36951-story.html
Tommy Rettig; Child Star of TV's 'Lassie' - Los Angeles Times
Feb 17, 1996 - Tommy Rettig, the first boy who tagged after Lassie during the famous collie's 20 years on television, has died.
tommy rettigchild starof tvlos angeles