PORTERDALE, Ga. - Porterdale City Manager Bob Thomson submitted a letter of resignation, which will be discussed and voted on during a special called meeting at City Hall on Monday, Aug. 12.

The Georgia Bureau of Investigation confirmed that Thomson is under investigation for forgery. GBI opened the case Aug. 1. 

Newton County District Attorney Layla Zon requested the GBI conduct a forgery investigation involving the City of Porterdale Wednesday, July 31, according to the GBI face sheet.

"Very generally, the scope of the investigation involves city funds and the authorization of spending of said funds," Zon said.

There were two executive sessions for personnel held during the July 18 work session and Aug. 5 meeting. 

Thomson had previously confirmed to The Covington News that the executive sessions were in reference to allegations of him using his government-issued credit card for personal spending.

"At this time, I don't have any comments," Porterdale Mayor Arline Chapman told The Covington News.

Chapman added, "I anticipate that we will accept the city managers resignation at tonight's meeting."

Attempts to contact Thomson for comment have not been successful. 

The Covington News will continue to update this story as information becomes available.