In a letter sent to Charlottesville City Council on Tuesday, Sidney C. Zemp said he does not want to be interim city manager because of “serious ethical shortcomings” on the council.

In the letter, Zemp said two social media posts by Mayor Nikuyah Walker, in which she said she was uncomfortable with how he had been chosen for the post, were only part of why he turned the job down.

“The controversy contrived by the mayor and her questionable motivations are only part of what I deem problematic for service to the city at the time,” Zemp’s letter reads.