Marcus Tyrone Knight was last seen in Oklahoma City on the evening of August 24, 2005. He was 23 at the time and was reported at Greenville Park about 7:00 PM, walking toward the Timberline Apartments off Northwest 10th Street and Greenvale Road. Marcus is Black, 5 feet 7 inches tall, about 150 pounds, with short wavy black hair, brown eyes, and a thin goatee. He was known by the nickname Conflict.

On the day he disappeared he wore blue jeans, a navy blue t-shirt, blue and white Nike socks and a silver linked bracelet. Distinct tattoos included a Bull Dog, the word Liquinasey on his neck, a man holding a gun on one arm, a skull on another arm, and a rolling 90 on another arm. His family reported him missing to the Oklahoma City Police Department on August 31, 2005; the case is NamUs MP79296 and remains an active missing person investigation.

No public information has been released about what happened after he was last seen. If anyone saw Marcus that night or knows anything about his whereabouts, please share what can help the family.