Cases

Actress and talk-show host Pridine Fru was imprisoned and physically and sexually abused by her adoptive parents, Joseph and Evelyn  Djoumessi, from the time she was illegally adopted at age 14 until she was rescued at age 17.

10 year old adoptive son of Donald Boss jr. and Lisa Boss Green was killed by the couple and buried in the basement. Timothy was adopted in Michigan,  but the Boss's informed Michigan authorities that the child was living in Iowa in order to receive monthly subsidy checks from Michigan.

9-year-old Russian girl from Borovichi, Novgorod, adopted by Crystal and Jesse Money from the State of Georgia was returned to Moscow by her adoptive parents because they could not cope with her.

The Moneys, claimed they were not fully alerted to Samantha's condition by the adoption agency, which gave them a glowing account of the girl's personality despite evidence of mental retardation.

Frank Foundation brought  "Samantha" back to the US to find a new home, her location is unknown.

2 children, then known as Ethan and Auriel Banks, adopted from Romania by Scott and Karen Banks, were disrupted and placed with the Duke Purcell family in American Samoa 9 years post adoption. The adoptees were left without any identity papers or passports and they could not leave the island.
Two years later, a third child with CP, also adopted from Romania, was institutionalized at age 12.

Banks had 2 bio children, 3 from Romania, 3 from Russia, and later one girl originally from China, that they were allowed to adopt against the wishes of the original adoptive parents.

See also: Tangled adoption suit heads to trial and Defendants in Samoan adoption scandal to plead guilty Tuesday

Mai Ly Latrace
Vietnam facilitator who worked with many agencies, operating under the name Project Faith.

Cheryl Carter-Shotts and Charlie Shotts fostered a boy from Mali who was disrupted after 4 years. He came to the US on humanitarian parole. (Shotts eventually adopted daughter, came to the USA on a "student visa")
This boy was named Mohammed (their 2nd son with the same name). He was with the Shotts for 4 years, placed in a group home, and later adopted by another woman.

Unsure of date

 
Fatima and Sali's 2-year-old daughter Zabeen was snatched as she played outside her home in Chennai. Fatima recognized Zabeen in an MSS brochure shown to her by police. Zabeen now lives with adoptive parents in Queensland.

In 2000, 4 children were located in Guatemala city casa cunas and returned to their mothers after the mothers complained to Prosectur Mario Orozco.

Boy adopted Mike and Sharon Venhaus was placed in foster care by his adoptive parents.

John Smith, died with 54 bruises, including three adult bite marks, on his body. The boy, was seen with injuries in four of the six months he spent with his prospective adoptive parents Simon and Michelle McWilliam. His penis was cut, his face burnt and his body bruised from head to toe, injuries seen by social workers who never once sought medical help for him. 

John died on Christmas Eve 1999 from a severe brain haemorrhage, which experts testified was caused by blows normally seen on battered boxers.