The following is a timeline of events related to the disappearances of Hannah Zaccaglini and Karin Knechtel-Mero from McCloud, Calif. in 1997.

• Feb. 14, 1997 — Bob and Alice Knechtel of Mount Shasta see their daughter Karin Knechtel-Mero at the home of Ed Henline Sr. and his wife Debbie Henline at East Minnesota Avenue in McCloud. Mero was 27 at the time of her disappearance and was last seen Feb. 14, 1997 at the Henline residence. Mero was living there with her boyfriend Ed Henline Jr.

• May 21, 1997 — The Knechtels have heard nothing from their daughter since February. Her 28th birthday passes and they still don't hear from her. The Knechtels continue to try to notify the Siskiyou County Sheriff's Department and California Pacific Medical Center in San Francisco after her disappearance. The hospital handled Mero's anti-rejection medicine and prescriptions after she had a liver transplant in 1994. The Sheriff's Department tells the Knechtels that Mero is an adult so she can leave when she wants. Deputies also have a warrant out for her arrest so they think she is hiding.

• June 4, 1997 — McCloud High School student Hannah Zaccaglini, 15, disappears from McCloud. Deputies say the last person to see her was Ed Henline Sr. outside his house.

• Late June 1997 — Sheriff's detectives ask FBI agents for assistance in the Zaccaglini case.

• Summer 1997 — Detectives do approximately four consent searches at the Henline home.

• Oct. 16 1997 — Sheriff's detectives tell the Knechtels that detectives can't get information on whether their daughter is receiving her medicine without a missing report. The Knechtels are finally able to make a report. FBI agents also help on the Mero case.

• November 1997 — Authorities cancel Mero's medical disability money and she still doesn't contact anyone.

• April 16, 1998 — Sheriff's detectives serve a search warrant at the Henline home. This is the first search warrant served concerning the Zaccaglini/Mero cases. Ed and Debbie Henline are arrested on suspicion of welfare fraud. They are suspected of writing checks on Mero's account from the time she disappeared to December 1997 and failing to report the extra income.

• April 30, 1998 — Ed and Debbie Henline plead guilty to perjury in connection to the fraudulent acquisition of funds from the checking account of Mero. The Henlines are sentenced to pay $2,000 and placed on three years probation.

• May 1998 — The Knechtels retrieve two of their daughter's rings that had been sold to Jon Thomas Jewelry in Mount Shasta.

• June 8 and 9, 1998 — Authorities serve two search warrants at the Henline home. These are the second and third search warrants served there. Two body-searching cadaver dogs scour the home and other areas of McCloud for two days.

• November, 1998 – The Siskiyou County and Shasta County Sheriff Dive Teams acted on a report that a fisherman recovered what she believed was human hair from Lake McCloud. A grid search was conducted in that area, but according to Siskiyou County Sheriffs detective John Villani, and "nothing was found in the underwater sweep."

• March 10, 1999 - Ed Henline Sr. and Deborah Henline were arrested on warrants charging them with various violations, including possession of a firearm by a felon. The couple had been arrested two days earlier, cited and released. Siskiyou County deputies did a parole search at their home. Deputies said they found weapons and drug paraphernalia which resulted in the warrants being issued.

• May 2004 – Siskiyou County Sheriff's Department Public Information Officer Susan Gravenkamp said several items of clothing, including a flower-patterned table cloth with red stains on it were found near McCloud. After testing by the Department of Justice Lab in Redding it was determined the cloth was "free of blood or body fluids," she said. The clothing was also not consistent with either Hannah's or Karin's sizes and were determined tho have been on the ground less than two years.

• 2008 – Former Siskiyou County Sheriff Rick Riggins hired retired detective Sergeant Rick Schwall to investigate the Mero cold case. Riggins said at the time he felt somebody that wasn't originally involved with the case might see something that might have been missed.

• 2010 – Newly elected Siskiyou County Sheriff Jon Lopey took over the reins of the department, and another cold case Detective Jeff Moser, took over where Schwall left off. After his election, Lopey said in a press release, "One of my major objectives is to review these cold cases, or on-going investigations."

• May 23, 2011 - Tragically, Karin's father, Bob Knechtel, passed away without ever knowing what happened to his daughter. His wife, Alice, said he never gave up hope that one day they would have her back so they could give her a decent burial.

• June 13, 2012 – Hannah Zaccaglini's cold case was officially reopened.

• November 15, 2012 – Ed Henline Sr. arrested and charged with first degree murder of Hannah Zaccaglini.

• November 17, 2012 – Ed Henline, Jr. arrested in Klamath Falls, charged with conspiracy and accessory to commit a crime in connection with the murder of Hannah Zaccaglini.