evidence: LITTLE ROCK (KATV) — Authorities on Thursday were investigating a TikTok video that possibly shows missing Arkansas girl Cassie Compton. [...] Tina Storz, a private investigator who has been searching for Compton for years, said that the girl strongly resembles Compton but could not confirm it's her. She said she has alerted local authorities and is trying to find out who posted the video. [...] Compton went missing in 2014 when she was 15 years old. The day of her disappearance, she went to a demolition derby in Dewitt with a family friend and returned home just before 7 p.m. She left a few minutes later and hasn't been seen since.