From the CBS 3 I-Team:

The TSA says all its employees go through a criminal background check before they’re hired, but because these cases are so old, criminal charges were not filed. A spokesman says the Camden Diocese settled the first two lawsuits with Harkins’ accusers–it has not seen this suit just yet.

And, because they were settled, there was no admission of guilt and no criminal record to be found so many years later.