 Alias "Jorge 40" confessed that the massacre had taken place because there had been reports that the neighborhood was an enclave of the Luciano Ariza Front of the National Liberation Army (ELN) guerrilla.He also confessed the motives of selecting December 8 as the date of the massacre, a traditional local Roman Catholic celebration known as the ""Dia de las Velitas"", and in which people use fireworks to celebrate.Fireworks would conceal the sound of the shots.