Volusia County Sheriff's Office detectives said the victim's son, Gregory Ramos, confessed to murdering his mother and, with the help of two friends, burying her body under a church fire pit.
WKMG reported that authorities sensed something was amiss and interviewed Ramos' two 17-year-old friends, Dylan Ceglarek and Brian Porras, who reportedly admitted to helping Ramos stage the burglary and bury Cleavenger's body.
Two 17-year-olds who Volusia County Sheriff Mike Chitwood said helped the boy hide the crime were released Sunday into home detention, where they'll wear ankle monitors.
Volusia County Sheriff Mike Chitwood said they brought Ramos out to the scene of the crime in the woods, where he said Ramos was excited to re-enact what happened.
Initially, the teen told police he came home from school and found his house had been ransacked and his mother was missing.
He then buried her body beneath a fire pit at River City Church in DeBary early Friday morning.
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"He went to school, left school early, which is where his story began to fall apart", Chitwood said.
Authorities said what started as an argument over a D letter grade at school ended with 46-year-old Gail Cleavenger being strangled to death in her bed as her husband was out of the state for business on Thursday night.
After the murder, police say Ramos called friends to help him make it look like someone had burglarized the home. His father was out of town at the time, police said.
Arriving home, Ramos placed what he called a "Grammy-winning" 911 call to report the burglary, using classes he took in criminal justice at University High to try and give a flavor of truth to his lies.
Ramos is then said to have strangled Cleavenger as she slept, before going to get a wheelbarrow to move her body, according to Fox13. "By all accounts she was an fantastic human being", Chitwood said. 'I have a feeling this is a case we'll be hearing about for years to come. "All our hearts break for this family", Chitwood tweeted on Saturday. "He wanted me to go to the crime scene and admire his work".