Walker allegedly operated a warehouse in the Atlanta area where he received shipments of cocaine hidden in tractor-trailers. The shipments were sent by a co-conspirator in Colorado. Walker allegedly would then distribute the drugs to individuals from South Georgia and South Carolina. Garcia-Martinez is an alleged co-conspirator who facilitated some of Walker’s drug transactions.

Law enforcement officers seized more than 135 kilograms of cocaine from the organization, a quantity worth more than $4 million at current wholesale prices in Atlanta. Law enforcement also seized more than $220,000 in drug proceeds.