A key suspect in the Kate Waring disappearance and murder pled guilty in circuit court this afternoon and detailed the final horrific moments of her life.

Heather Kamp pled guilty to voluntary manslaughter, obstructing justice and forgery. She has a sentence agreement of 45 years in prison, however, if she cooperates with authorities then prosecutors will seek a shorter prison sentence.

Kamp testified today that on June 12, 2009, she and boyfriend Ethan Mack made a bet whether Waring could fit in a suitcase. At that point, Mack began shocking Waring with a stun gun. He then hit her over the head with a wine bottle and put her inside the suitcase.

"Mack then pulled the suitcase with Ms. Waring in it to the bathroom," Ninth Circuit Solicitor Scarlett Wilson said in court. "With some initial help from Kamp, Mack put Ms. Waring in the tub. Although unconscious, Ms. Waring was still alive."

Waring drowned in the water-filled tub.

Waring lived with her parents on Murray Boulevard in Charleston. She vanished after she went to a West Ashley gym, a downtown drugstore and then to Wasabi Japanese Steakhouse.

Her remains were found in October deep in the Wadmalaw Island woods inside a secluded, gated community.

In April, a Charleston County grand jury indicted Kamp and Mack on murder charges.

Check back to postandcourier.com later for additional details.