Hannah Zaccaglini was 15 when she was last seen on the evening of June 4, 1997, in McCloud, California. She left her boyfriend’s apartment about 10 p.m. to walk one or two blocks home but never arrived. At first investigators thought she might have run away; she had been under emotional distress after her parents’ divorce and a breakup.

Her family found all of her personal items left behind, including money, her purse, and her bass guitar, facts that led investigators to conclude foul play was likely. The last known person to see her was Edward Ray Henline Sr., who said he spoke with her briefly outside his home before she walked away. Henline and his family were reported to have borrowed and then thoroughly cleaned Hannah’s mother’s van soon after the disappearance.

In 2012 Henline Sr. and his son, Ed Henline Jr., were charged with Hannah’s murder; those charges were dropped in 2013 for insufficient evidence. Authorities continue to treat the case as involving foul play and the disappearance remains unsolved.