ˌɔn twˈɛnti dʒˈuːn nˈaɪntiːnhˈʌndɹɪd nˈaɪnti fˈoːɹ, ðɪ əpˈoʊzɪŋ pɹˌɛzɪdˈɛnʃəl kˈændᵻdˌeɪt ændɹˈeɪz pæstɹˈɑːnə ðˈɛn mˌeɪd pˈʌblɪk ðə nˌɑːɹkəkɐsˈɛts ɐ sˈɪɹiz ʌv tˈɛlᵻfˌoʊn ɹᵻkˈoːɹdɪŋz ɪnwˌɪtʃ mˈɛmbɚz ʌvðə kˈɑːli dɹˈʌɡ kɑːɹtˈɛl mˈeɪnli dʒˈɜːnəlˌɪst ælbˈɜːɾoʊ dʒɜːɹˈældoʊ tˈɔːkt wɪð ɡˈɪlbɚtˌoʊ ænd miːɡˈɛl ɹədɹˈiːɡɛz oːɹdʒwˈeɪlɚ ɹᵻɡˈɑːɹdɪŋ ðə faɪnˈænsɪŋ ʌvðə sˈæmpɚ kæmpˈeɪn fɚðə pɹˈɛzɪdənsi.
On 20 June 1994, the opposing presidential candidate Andrés Pastrana then made public the Narcocassettes a series of telephone recordings in which members of the Cali drug cartel mainly journalist Alberto Giraldo talked with Gilberto and Miguel Rodríguez Orejuela regarding the financing of the Samper campaign for the presidency.