Oklahoma State Bureau of Investigation Capt. Stan Florence said authorities believe the suspect knew the victims, who were found dead Sunday night at the 10-acre farm west of Hennessey, about 55 miles northwest of Oklahoma City.
“They all know each other," Florence said. "Don't know if they're related, or if they're coworkers, but certainly these individuals were, we believe, all familiar with each other.”
Authorities have not identified the victims or said how they were killed. The injured person was taken to an Oklahoma City hospital. The case is being investigated as a quadruple homicide.
The Kingfisher County Sheriff’s Office initially responded to a reported hostage situation at the farm but requested help from state authorities, Florence said.
“At this point, we have a suspect in mind," Florence told reporters Monday at the property. "We have no information specific to be able to share ... at this point.”
Police searched the property late Sunday and Monday using drones, helicopters and on the ground, Florence said, but did not find the suspect.
“There’s a lot to unravel with this case," he said. "It’ll take a little time for us to process it.”
Oklahoma voters legalized medical marijuana in 2018 and the industry quickly boomed, thanks to an open-ended law that put in place fewer restrictions than in other states.
In March, voters will decide whether to legalize the recreational use of the drug.