Here are the worst acts of abuse two Perris parents are accused of committing against 13 children

Days after 13 malnourished siblings were removed from a Perris home, authorities gave a disturbing list of acts that were allegedly committed upon them by their parents.

They were detailed Thursday during a news conference held by Riverside County District Attorney Mike Hestrin, who referred to the acts as "extreme and prolonged physical abuse."

"The punishment would last for weeks, even months, at a time," he said as reporters grimaced at some of the acts that were bullet-pointed by the district attorney. "It breaks our hearts."

WHAT WE LEARNED: Children were starved and beaten, district attorney says

Here are 10 acts that David and Louise Turpin are accused of committing against their children, who spent two years planning an escape:

- Committing a lewd act on one of the children, who's under the age of 14. Only David Turpin is suspected of this.

- Tying them up with rope before using chains and padlocks after one of the children learned to untie the rope.

- Beating and strangling the children.

- Barely feeding them and eating apple and pumpkin pie in front of the hungry children.

- Punishing them for getting water on their wrists, which was perceived as playing with water.

- Not allowing them to shower more than once a year.

- Purchasing toys, but leaving them unopened and preventing kids from playing with them.

- Not taking them to see doctors and dentists in at least four years.

- Forcing them to sleep by day and stay up at night.

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- Homeschooling them and providing a lackluster education to the point some of them didn't know what a police officer was.

The couple pleaded not guilty to the accusations during their arraignment Thursday in Riverside County Superior Court. Both are being held in lieu of $12 million each. If convicted, they face up to life in prison.

The siblings are being treated at a hospital and officials say they're doing well.

"They're relieved. I will say that," Hestrin said.