HILLSBOROUGH, N.C. -- Four people are facing drug trafficking charges after a bust in Orange County Friday night.The Orange County Sheriff's Office said around 8 p.m., they investigated a residence in the 500 block of West Hill Avenue near Hillsborough.During the investigation, deputies discovered 82 kilos of suspected cocaine, two kilos of suspected heroin, and a firearm.Investigators arrested Carlos Salazar, Edi Daniel Salazar-Jimenez, Miguel Angel Robles-Puentes, and Jose DeJesus Villanueva-Miranda for Trafficking more than 400 grams of Cocaine and Trafficking more than 28 grams of Heroin.All four are incarcerated in the Orange County Detention Center on $500,000 secured bond.