A woman involved in smuggling contraband into prisons across Oklahoma has been arrested, according to the Department of Corrections.

The DOC arrested Alicia Anderson Tuesday after an 18-month-long investigation. Investigators say she used drones to smuggle illegal items into prisons dozens of times. They also say they found a warehouse full of drugs, tobacco, phones, counterfeit money, and drones in Oklahoma City.

“Combatting the introduction of contraband into state prisons is a never-ending process, which becomes tougher as criminals become more technologically proficient,” said ODOC Public Information Manager Josh Ward. “But this agency remains committed to investing the resources necessary to protect inmates and staff from the dangers these items present in prisons.”

Anderson is currently in the Hughes County Jail facing three charges of bringing contraband into a jail or penal institution, and one count of conspiracy.