The school was wrong…PERIOD.
In the late 70’s and early 80’s abuse of this type was not as much on the radar screen of the police. As a result, due to a lack of educational awareness they didn’t do anything.
For honesty sake: The new schools failed to call YU for a reference. The two staff members didn’t contact YU to let them know where they were hired, so YU has no responsibility.
This is drastically different than what goes on nowadays with all the educational awareness and advocacy on behalf of children. Schools that are aware of allegations nowadays had better ensure things are investigated and no shuffling to different schools.