Deputies responding to a reported hostage situation on the evening of Sunday 20 November 2022 found four people shot dead at a marijuana growing operation on a 10-acre property west of Hennessey in Kingfisher County.[1][2][3] The victims, three men and one woman, were Chinese nationals, and a fifth Chinese national was found shot multiple times and airlifted to hospital.[1][2][3] The state bureau of investigation said the killer spent a significant time inside the building before the executions began, which was why the first call came in as a hostage situation, and that the attack did not appear random.[1][2]

The suspect, 45-year-old Wu Chen, was arrested without incident on 22 November in Miami Beach, Florida, after a car tag reader flagged his vehicle, and was held for extradition to Oklahoma on murder and shooting-with-intent-to-kill charges.[1][2][3] He had worked at the farm and invested in the operation, and confronted the workers saying he was owed $300,000.[4]

The grow held an active state licence, and the Bureau of Narcotics said investigators were determining whether it had been obtained legally or fraudulently.[2][3]

The case is part of a wider problem of black-market operators in Oklahoma using suspected human trafficking victims, including Chinese nationals, to grow and trim marijuana sold in legal dispensaries.[3]