The Siskiyou County Sheriff’s Office is again directing more investigative resources to some cold missing persons cases. Sheriff Jon Lopey says there are still many unanswered questions. The 1997 disappearance of then-15-year-old Hannah Zaccaglini has been very frustrating. Detectives say Hannah was murdered, even though no trace of her has ever been found. She left a friend’s house in McCloud on June 4th, 1997 and was walking to her home just one block away, but never arrived. Witnesses have told detectives that Hannah had last been seen walking with Ed Henline Senior near his McCloud home. Despite extensive efforts and a lot of circumstantial evidence, investigators have been unable to recover any physical evidence or determine how Hannah died. Ed Henline Senior was arrested in 2012 and charged with murder in the case. Henline’s son, Ed Henline Junior, was arrested for conspiracy. Both were subsequently released for lack of evidence. District Attorney Kirk Andrus said 4 years ago that despite their certainty of guilt, it would not be possible to prove beyond reasonable doubt in a trial. Detectives are still appealing to the public as they believe that other people know something about Zaccaglini’s disappearance and the circumstances surrounding her presumed death. Ed Henline Senior was also a person of interest in the 1997 disappearance of another McCloud resident, 27-year-old Karin Knechtel Mero. Mystery still surrounds the 2002 disappearance of 34-year-old Angela Fullmer. Her last known sighting was near Lake Siskiyou, where she was seen with an ex-boyfriend. She also is presumed dead. A fourth unsolved murder is that of Patricia Joseph, whose body was found in the Klamath River in July of 2005. She died of blunt force trauma and asphyxia. Siskiyou County detectives continue to seek tips from the public in all four of the cases, and none of them will be closed until they’re resolved.