http://en.wikipedia.org/wiki/Joe_Sánchez
"Sánchez discovered, by accident, that one of his lieutenants was receiving payments and sexual favors in exchange for protection. After issuing a routine traffic summons to the brother of a powerful businessman, Sánchez was invited to the businessman's office and asked if he would be interested in providing protection for his drivers, "the same as your lieutenant and captain are doing." The businessman then offered him money.[2] When Sánchez reported this situation to the NYPD Internal Affairs Division (IAD), they "wired" him with a recording device, with the supposed intent of gathering proof of his accusations against the lieutenant and the captain.[1]
Unbeknownst to Sánchez, the people who wired him were also friends of his lieutenant. Sánchez returned to the businessman and gathered enough information to implicate this lieutenant and captain on corruption charges. However, upon learning of the situation, the lieutenant and the captain transferred Sánchez to another Court Division in the Bronx, and the IAD investigation was quietly shelved.[3]"
Where both honest cops betrayed by Internal Affairs?
NYPD Whistle Blower Adrian Schoolcraft meet NYPD Whistle Blower Joe Sanchez