Match the job role with the job title

Internal Revenue Investigator:

- Review financial records of large businesses and corporations.

- Review tax documents and returns for errors and inaccuracies

These are two actions done by the IRC people to ensure people and corporation pay their taxes correctly in order to finance the government to deliver services to the population.

Federal Aid Coordinator:

- Evaluate students applications for financial aid

- Review policies and grant funds to students in need

These are two aspects of an aid coordinator to help administer and distribute the financial aid programs money to the students.

Paralegal:

- Gather evidence and prepare for court

- Conduct research that is pertinent to a criminal case.

Both deal with the justice and criminal offenses, so it's most likely the job of a paralegal, who is an assistant of a lawyer, doing research mostly.