Federal authorities will now helm the investigation of the April 11 killing of Katherine Guerrero De Aguasvivas, the Homestead woman carjacked in Winter Springs and found dead in Osceola County, as it appears connected to a larger drug trafficking operation spanning several Florida counties. The decision was announced Monday by Seminole County Sheriff Dennis Lemma, 18 days after Guerrero De Aguasvivas was kidnapped at gunpoint in broad daylight.