A woman who helped her boyfriend wrap his 2-year-old son’s body in garbage bags, stuff it into a plastic trash can and fill the can with 400 pounds of cement in 2010 pleaded guilty last week to her role in the child’s death.

Grace Trotman pleaded guilty to one count of homicide by child abuse and one count of desecration of human remains. She faces 20 years to life in prison on the homicide charge and as long as 10 years in prison on the desecration charge.

She will be sentenced later, according to Deputy Solicitor Bryan Alfaro, though a date has not been set.

Authorities say 2-year-old Rodricus Williams died after his father, Roger “Tony” Williams, refused to get him medical help and forbid Trotman from contacting a doctor. The pair dumped the dead child behind an abandoned mobile home in Orangeburg County, officials said, and then spun a tail about the boy falling into Charleston Harbor while strolling along the Battery seawall downtown.

Police launched a massive search for the child that lasted 12 hours on July 6. In reality, the child had been dead about a month, and Williams concocted the story because the boy’s mother was headed to town to see him.

Arrest reports say Rodricus died around June 6 of that year while in Trotman’s care at her Summerville home. Trotman reportedly called Williams about a medical problem with the boy, but Williams told her not seek help and then, when he returned home, he refused to take action himself, according to arrest reports.

Trotman eventually led authorities to the cement-filled can behind an abandoned house in Bowman, where investigators asked a farmer to help them hoist the cement-laden tomb with a backhoe. The Berkeley County coroner later ruled that Rodricus died of blunt trauma to the head.

Read more in Wednesday’s editions of The Post and Courier.

Reach Allyson Bird at 937-5594 or Twitter.com/allysonjbird.