Article continues below advertisementJenna Miscavige, the niece of Church of Scientology leader David Miscavige, spoke out in a new TikTok video about her missing aunt, Shelly Miscavige. Being the wife of a religious figurehead, Shelly made many public appearances by his side until June 2006. However, she hasn't been spotted in public since August 2007, when she attended her father's funeral.