Police: Heather Elvis murdered at Peachtree Boat Landing

The arrest warrants detailing the murder and kidnapping charges against Sidney and Tammy Moorer, in the death of Heather Elvis, were released Monday afternoon and contain information about when police think Heather was killed and where.

The warrants for both on the charge of Murder say that on or about December 18, 2013, at Peachtree Boat Landing in Socastee, they "did unlawfully, without just or sufficient cause, murder Heather Elvis with malice forethought."

The warrants for both on the charge of Kidnapping say that on that same date, the couple "did unlawfully seize, confine, kidnap, abduct or carry away Heather Elvis..."

The Moorers were charged with Murder this morning after being arrested February 21 in connection with Elvis' disappearance. Police have not released a motive in the case, saying only that there was a relationship between the Moorers and Heather Elvis.

"Yes, that was established throughout the course of the investigation as well," said Horry County Police Chief Saundra Rhodes.

READ MORE: Timeline of events in the Heather Elvis case

Heather Elvis, a 20 year old from Socastee, was last seen at her home after she returned from a date on December 17.

On December 18, her cell phone pinged for the last time around 3 a.m.

On December 19, her father, Terry Elvis, reported her missing to authorities. Her car was found in the parking lot at Peachtree Boat Landing on the Waccamaw River in Socastee.

Horry County police say they've had a seven agency task force investigating the case since then.

The murder charges were announced this morning at a news conference held by police.

WATCH: Police news conference on Heather Elvis case

Police say they are communicating with the Moorers through their attorneys, but so far that hasn't led police to finding Heather.

Sidney and Tammy Moorer were in court this morning on the kidnapping charges, filed against them yesterday, in connection to the case. They waived their rights to a bond hearing on the kidnapping charges.

The couple is also charged with Obstruction of Justice and Indecent Exposure in connection to the case.

READ MORE: Arrest warrants released on Obstruction of Justice and Indecent Exposure charges

The case broke wide open Friday, when police served a search warrant at the home Sidney and Tammy share on Highway 814 near Myrtle Beach. For 11 hours, police and several other agencies searched the home, cars and property. Horry County Police Chief Saundra Rhodes said the evidence gathered Friday is what led to the charges, but she declined to go into any detail about the evidence.

The bond hearing on the Murder charge will be held the week of March 17.

We have reached out to the Elvis family for comment, but Donna Elder, with the 15th Circuit Solicitor's Office, says the Elvis family will not be making a comment until after the bond hearings on the Murder charges are held.

Stay with WPDE NewsChannel 15 and for continuing updates on this story.