The "Patrones de Ucayali" (Bosses of Ucayali) was a criminal timber trafficking network operating in eastern Peru until 2020. Led by Juan Miguel Llancari Gálvez, a former police officer and loan shark, the network specialised in illegally harvesting valuable hardwoods from the Amazon rainforest and laundering them into legal supply chains. The network specifically targeted tropical hardwoods shihuahuaco and estoraque, which are particularly prized for flooring and decking, especially by Chinese importers. The network employed a specialist who created falsified Timber Transport Permits (GTFs) and other required documentation, such as logging contracts, stamps from forestry authorities, invoices, and bank receipts. The network also maintained three police officers on their payroll who would escort shipments, distribute bribes at checkpoints, and alert drivers to the presence of patrols that weren't friendly. Despite an extensive investigation involving surveillance and wiretaps, the network's leaders were tipped off before arrests could be made, and the subsequent prosecution failed when a judge controversially ruled that no crimes had been proven.