A retired teacher who is accused of sexually abusing a foster child under his care was arraigned Thursday in Lucas County Common Pleas Court.

Robert Koenig, 62, of 2445 Green Valley Dr. pleaded not guilty to rape and two counts of gross sexual imposition.

An indictment filed last week alleges he sexually assaulted a boy who is under the age of 10 years old between July 14 and Dec. 12, 2014.

Mr. Koenig and his wife, Bettie Koenig, were foster parents for Lucas County Children Services at the time.

He was released two days after his Monday arrest after posting the $300,000 bond. Judge Ruth Ann Franks on Thursday continued the bond. She set trial for May 18.

Dean Sparks, executive director of Lucas County Children Services, said the agency licensed the Koenigs through Ohio Jobs and Family Services and provided foster care to children for five years. They were removed in February.

“We were in the process of revoking their license,” he said. “They voluntarily withdrew their license.”

The agency sent about 10 children to the Koenigs’ home while they were foster parents. Most stayed for short-term care, the agency said.

Mr. Sparks said the couple had passed all background checks, assessments, criminal history, and other reviews before they became foster parents, and CSB caseworkers inspected their home monthly.

“We had never had any complaints about this family,” he said.

Mr. Koenig was employed as a teacher for Toledo Public Schools from 1975 to 2010 and returned as a substitute teacher from 2010-13.

Most of his career was spent at middle schools, where he taught business-related classes, a spokesman said.

First Published March 27, 2015, 4:00 a.m.