Crime in the work place is a problem, whether it takes place in the public sector or the private sector. But one advantage of having goods and services provided by private firms rather than by government is that you put the liability closer to where it belongs.
That is, if a private-sector worker commits a crime, then the liability for the lawsuits falls on the private firm, not on the taxpayer. The costs of the new training and procedures needed to prevent a recurrence of the crime are borne by the private firm, not by the taxpayer.
I realize that there are other aspects of this (alleged) crime that are much more awful than the issue of who pays. But I was struck by the fact, given that it is my tax dollars involved, that I will be sharing in the costs of dealing with it.