A female behavioral therapist has been found guilty of raping and sexually abusing a 13-year-old autistic boy in her care after searching '15 years younger boyfriend' on her cellphone.

Abigail Minjung Kim, 28, was convicted by a jury in Oregon after her young victim told the court he had 'humped' Kim multiple times.

He also said they were boyfriend and girlfriend who kissed and hugged and on their last day together they had sex, Oregon Live reports.

Kim was found guilty of first-degree rape, second-degree sodomy and six counts of first-degree sexual abuse at Multnomah County Circuit Court on Monday.

The court heard how she searched for '15 years younger boyfriend', 'How to deal with an autistic boyfriend', 'Can a minor be charged with sexual harassment' and 'legal proof of child sexual abuse in the absence of physical evidence'.

Oregon behavioral therapist Abigail Minjung Kim has been found guilty of raping and sexually abusing a 13-year-old autistic boy in her care after her young victim said they 'humped'

The Korean immigrant reportedly showed little emotion as the verdict was read out and looked straight ahead.

Her defense lawyer Adam Dean had said the 95-pound woman had been attacked by the boy. He said she was scared to report the incidents.

But prosecutor Melissa Marrero said Kim had an 'inappropriate, intentional, voluntary relationship' with the boy who was barely 13.

The abuse is said to have happened in October and November 2017 during visits to his home where she often met with the boy in his room.

Marrero said: 'He was particularly vulnerable because of his disability. She knew exactly what his needs were and she exploited those.’

The boy's mother - unaware of the abuse - asked for a new therapist. Kim then said she had been attacked by her victim. Marrero said until then she had been asking to work more hours with the boy.

Kim - who was fired from her job in the fall of 2017 - will be sentenced in May.