The man accused of murdering 36-year-old Karl Beaman, Jr. in Aurora, Colorado and hiding his body in concrete had allegedly committed a robbery with the victim and believed the victim was a police informant, according to an arrest affidavit.

Beaman’s remains were found on Tuesday, April 4, after the victim’s mother received a direct message through a Facebook page stating that her missing son was buried under an apartment. The message said, “He’s buried under Casie Bock’s apartment. In the crawl space. Under cement. She and Leroy did it. I’m sorry.”

Officers from the Aurora Police Department arrested Casie Bock, 29, on an accessory charge, while her ex-lover, Haskel Leroy Crawford, is charged with first-degree murder.

The user who messaged the victim’s mother said Bock had confessed to the crime one night while she was high and told her where the body was hidden.

The tipster told police that Bock had admitted she was “upset about people being in her walls,” two to three weeks before the body was found.  Bock had told her that Crawford and Beaman were “good friends” until they almost got caught stealing catalytic converters together, which made Crawford doubt Beaman’s loyalty and believe his friend was a police informant.

Detectives obtained a search warrant to enter Bock’s apartment and located a crawl space in the entryway. They found a mound of concrete there and what looked like human remains through cracks in the concrete.

Bock initially denied her involvement in Beaman’s death and concealment of his body but later confessed that she had come home from work and found his dead body on the ground with a plastic bag over his head. She told investigators that Crawford had forced her to help him conceal the body and threatened her if she refused to assist.

Crawford is in Jefferson County Jail for an unrelated crime at the time of his arrest for the murder of Beaman. His bail is set at $100,000.