Jurors this afternoon have found a Brooklyn grandmother guilty in the death of four-year-old granddaughter.

Loretta Brett was found guilty of manslaughter, unlawful imprisonment and endangering the welfare of a child in connection with the 2010 death of her granddaughter, Marchella Pierce.

Marchella's mother, Carlotta Brett-Pierce, was found guilty Wednesday of murdering her child.

She was also found guilty of assault, unlawful imprisonment and endangering the welfare of a child.

Police say that when Marchella Pierce was found, she was suffering from child abuse syndrome and had signs of being beaten and starved.

Her body was emaciated and covered with bruises.

She weighed less than 19 pounds when she died.

Prosecutors charged that Brett-Pierce drugged the child by giving her potent doses of Benadryl and Claritin.

She also tied her down to a bed because she didn't want to be bothered with the special needs child.

Prosecutors charged that Brett watched it all happen over the seven months that Marchella lived with her and did nothing to prevent it.

"We are once again satisfied with the verdict," said Jacqueline Kagan, the prosecutor for the Brooklyn District Attorney's office. "This is justice for Marchella. The people who stand by and watch have to be held accountable, and that's what this defendant did. She did nothing. She let it happen,"

The judge instructed Brett that as of now she now cannot have contact with any of her grandchildren.

Brett's attorney, Julie Clark, said her client was devastated.

"She was a grandmother helping out. She's lost her grandchildren, she had a grandchild who died and now she's going to face jail time," she said.

Clark added that she was happy the jury found her not guilty of assault, as it would have added seven years of jail time to Brett's sentence.

Sentencing for both women is June 6. Brett faces 15 years in jail, while Brett-Pierce faces 32 years to life.

A case worker and a supervisor from the New York City Administration for Children's Services are facing criminally negligent homicide charges in Pierce's death.

A trial date for them has not been set.