Bill Tilghman Presentation: On Friday April 5, historian Dee Cordry will be speaking about Oklahoma lawman Tilghman to the Indian Territory Posse of Oklahoma Westerners. Tilghman was a deputy US marshal of Oklahoma Territory, sheriff of Lincoln County, OKC chief of police, and state senator of Lincoln County. Tilghman was murdered in 1924. The program and parking are free; catered meal available at $15. The meeting begins at 6:30 pm at the Hart Building (south entrance), 726 West Sheridan, OKC.