CHARLOTTE, N.C. – A former doctor is in jail in Lincoln County and is charged with raping a patient 17 years ago. Investigators are now asking any other possible victims to come forward. John Marshall was an OBGYN when a woman said he assaulted her while treating her in 1996. She didn’t report it until last year. Dr. Marshall has a history of misconduct, including touching nurses. WCCB Charlotte found that the State Medical Board suspended his license indefinitely in 2011. Before he lost his license, Marshall volunteered at a free clinic in Mecklenburg County.