[Liberian Observer] Liberia's sweeping investigation into the seizure of approximately 237.6 kilograms of cocaine at Roberts International Airport (RIA) entered a critical new phase as Paul J. King, General Manager of GLS Menzies and one of 10 individuals named as persons of interest, voluntarily surrendered to authorities amid an expanding probe that officials say has uncovered evidence of a complex network operating within the country's cargo and aviation security chain.