Mexico City , Mexico ( CNN ) -- A radio station in Mexico has aired parts of a telephone conversation it alleges took place between a top drug lord and a federal congressman . In the recording , voices the station identify as those of lawmaker Cesar Godoy and Servando Gomez -- also known as `` La Tuta , '' leader of the La Familia cartel -- express support for one another and discuss a wide range of topics including upcoming elections and a local reporter stirring up stories . The tape has renewed concerns about corruption in a country struggling to subdue its powerful drug cartels . More than 28,000 people have died in drug violence in Mexico since 2006 , according to authorities . W Radio says the conversation took place more than a year ago and was collected as part of an investigation into Godoy 's suspected cartel ties . The station did not disclose its source for the tape . An official at the Mexican Attorney General 's Office confirmed the recordings represent the real voices of Godoy and Gomez , but declined further comment . `` First of all , I want you to win . You have total support . You will win , '' the voice identified as Gomez ' says in a conversation broadcast by W Radio . The two male voices are heard talking about possible informants and a journalist who is said to be causing the congressman trouble . Toward the end of the recording , the voice identified as Godoy 's warns his friend : `` Much care must be taken . This thing is heating up . '' Godoy , who represents the state of Michoacan , already faces federal charges for allegedly helping the cartel , which is active in his area . He currently has immunity from arrest because of his status as a lawmaker , but he could lose that . On Thursday , Godoy responded to the recordings , calling them part of a broad smear campaign . Godoy , who was elected last year , failed to appear Friday at a congressional committee hearing meant to address his alleged cartel ties . He sent word his mother was ill and is now expected to appear Monday . Thursday , he spoke briefly to reporters . He never specifically denied the voice in the recording was his . Godoy accused the government of leaking the tapes to discredit him . As it can not prove its case against him in court , the government will try to win it politically , Godoy said . `` It all has to do with a political persecution against me , '' he said .
W Radio identifies the voices in the taped conversation as those of Garcia and Gomez . The station does not say how it got the recording . An official at the attorney general 's office says the voices in the recording are authentic . Godoy , a congressman , says the recording is part of a smear campaign .