What does "in service of" in line 361 mean?

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"in service of" is used when something/someone is "working for/to do" or "doing something for" another thing/person. Here, fraud is doing something. There is some purpose that fraud is fulfilling. What is the purpose? What is fraud doing? Fraud is being used to conceal a felony. Fraud is being used as a service to conceal a felony. This example is a little more abstract since it uses these actions (fraud and concealing a felony) instead of people as you would usually hear it.

Here are some other examples using this phrase:

The messenger was sent in service of the king.
The volunteers, in service of the neighborhood, built a new playground.
Politicians should be in service of the citizens.
Science's rightful place is in service of society.

So, here's a formula:
A + in service of + B, where A & B are people or things or actions
=
A + working for/doing something for + B