Edward Vanwoudenberg, 57, has reportedly been seen in west Tulsa and the Oakhurst area, and is currently wanted on an outstanding misdemeanor. They say he may stay in transient camps along the Arkansas River.
Police found Sampson's 1998 Ford Explorer Thursday near 15th and Riverside after receiving a call to check on a vehicle parked along the street for an extended period of time.
The TPD Forensic Lab is processing the vehicle for evidence.
Anyone with information on Vanwoudenberg's whereabouts or Sampson's homicide is asked to call Crime Stoppers at (918) 596-COPS. Tipsters can text TIP918 to CRIMES.