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Sheriff Johnny Mack Brown

Sheriff Johnny Mack Brown was elected as Greenville County Sheriff in 1976 and took office in 1977 where he served six terms. Sheriff Brown later retired in 2001 and became a U.S. Marshal after being nominated Pres. George W. Bush.

Upon appointment by Governor McMaster, Sheriff Brown returned to his position as Sheriff of Greenville County on April 17th 2018. 

The mission and vision of the GCSO remains the same: to defend the preservation of life, property and civil liberties within the context of legitimate state and county law enforcement policies, and to establish an atmosphere of trust and cooperation among our law enforcement officials and the citizens they serve, through legitimate policing which consistently upholds ethics, integrity, and transparency.

We stand ready to serve everyone in the community in a manner that upholds the values of the Greenville County Sheriff's Office and every deputy serving at this agency. We remain honored and proud to serve our citizens.

"This will always be a part of me, I'm glad to be back home."

~Sheriff Johnny Mack Brown




Chief Deputy
Marcus Davenport

Chief Deputy Marcus Davenport's distinguished career in law enforcement began in 1995, when he became a uniform patrol deputy with the Greenville County Sheriff's Office. Chief Deputy Davenport, who holds degrees in Criminal Justice and Psychology from the University of South Carolina, has since proudly served 21 years with the Sheriff's Office. Throughout those 21 years, Chief Deputy Davenport held the positions of Master Deputy, Sergeant, Lieutenant, Captain and Major. In addition to his current duties as Chief Deputy, he oversees the Office of the Sheriff, the department that focuses on community outreach and is the Chief Financial Officer for the Sheriff's Office. 

Outside of the Sheriff's Office, Chief Deputy Davenport enjoys volunteering for the Greenville Homeless Alliance and serving on the Inaugural Advisory Council at St. Joseph School in Greenville.



Major Ty Miller

Major Ty Miller began serving Greenville County as a law enforcement officer in 1999. Beginning her career in the Uniform Patrol Division of the Greenville County Sheriff's Office, Major Miller immediately focused on the area of crimes against children. Since then, Major Miller has dedicated most of her career to protecting and serving the most innocent citizens of the Greenville community in her roles as an investigator of child sexual assaults and as a board member for the Julie Valentine Center in Greenville. 


In 2012, Ty Miller was promoted to the rank of Sergeant and initiated collaboration with the Greenville County School District to develop and implement the "Zone Patrol Program," in the wake of the Sandy Hook school shooting. The following year, she was promoted to Lieutenant of the Public Information Office at the GCSO. Today, Ty Miller is the Major over Operations which includes the Specialized Crimes Unit. She has worked tirelessly to deliver justice to the victims of crimes against children and families, as well as to gather vital intelligence leading to the capture of Internet-based predators through her unit’s CAC and Human Trafficking Divisions.




Sgt Major
Craig Welch

Command Sergeant Major Craig Welch has over 15 years of experience in the field of law enforcement. During his tenure, he has served as a Field Training Officer in the capacities of Deputy and Master Deputy for 8 years, having had the privilege of training many law enforcement officers to become highly qualified deputies serving the residents of Greenville County.

Prior to starting his law enforcement career, Command Sergeant Major Welch served as a sergeant in the United States Marine Corps and had been deployed overseas on assignment to a small unit specialized in anti-terrorism. Upon his return to the United States, Welch was stationed at Camp Pendleton, California with the 1st Marine Division. While at Camp Pendleton, Welch was hand-selected to become an Advanced Infantry Instructor, becoming exceptionally proficient in advanced tactics and combat skills.