The California parents that were arrested last year for beating, starving, and imprisoning 12 of their 13 children have pleaded guilty.

David, 56, and Louise Turpin, 49, both entered a plea of guilty for the charges of torture, dependent adult abuse, child endangerment, and false imprisonment. The Turpins each have 14 counts against them. KABC, an ABC affiliate in Riverside, reported the couple accepted a plea deal so the case will not go to trial.

Riverside County District Attorney Michael Hestrin said in a news conference Friday that the Turpins will serve an "indeterminate life sentence," adding, "This is among the worst, most aggravated child abuse cases I have ever seen or been involved in."

David and Louise were arrested in January 2018. They were found to have allegedly kept their children shackled to their beds in their Perris, California, home with little food. The children were only allowed to shower once a year and one of the daughters was a victim of an alleged lewd encounter with her father, NBC News reported.

When officers arrived at the Turpin home on Jan. 15, 2018, they found three children chained to furniture, KESQ-TV, an ABC affiliate in Palm Springs reported.

According to prosecutors, the couple abused 12 of their children that ranged in age from 2 to 29 years old. Only the youngest child was reportedly spared from the abuse.

Authorities were alerted to the abuse when one of the teenage children escaped the home. The 17-year-old daughter was able to call 911 to report the abuse from her parents.

The Turpins will not be eligible for parole unless a parole board determines that they should be released. They will not be eligible for a parole hearing for 25 years. Sentencing for the couple is set for April 19.