Chinese national who admitted to fatally shooting four people at an illegal medical marijuana operation on an Oklahoma farm has been sentenced to life in prison.

Chen Wu, 47, pleaded guilty at a court hearing Friday to four counts of first-degree murder and to one count of assault and battery with a deadly weapon in connection with the Nov. 20, 2022 killings, The Associated Press reported, citing court records. Prosecutors say Wu, also known as Wu Chen in jail records, fatally shot three men and a woman in a garage at the farm west of Hennessey, a town about 55 miles northwest of Oklahoma City, within minutes of him demanding they return the $300,000 he had put into the growing operation.