<blockquote>Among the Limited Use sources the DEA established were Amtrak and Transportation Security Administration (TSA) employees. In November 2015, the OIG completed two separate investigations into DEA’s use of two Amtrak employees and one TSA employee as sources. These investigations determined the DEA’s use of these individuals as sources was improper.1 During this audit, we found that, between FYs 2011 and 2015, the DEA actually used at least 33 Amtrak employees and 8 TSA employees as sources, paying the Amtrak employees over $1.5 million and the TSA employees over $94,000.</blockquote>
via <a href="https://oig.justice.gov/reports/2016/a1633.pdf">Audit of the Drug Enforcement Administration's Management and Oversight of its Confidential Source Program - a1633.pdf</a>.