A county department head's scathing memo accusing Clayton County Chairman Jeff Turner of micromanagement and other inappropriate conduct has been turned over to a "third party" for review, Turner said Tuesday.

Clayton County Board of Commissioners Chairman Jeff Turner talks to reporters after a referendum to join MARTA for the November ballot passed during a meeting of Clayton County's Board of Commissioners Tuesday, July 1, 2014, in Jonesboro, Ga. If approved by voters, the transportation measure would usher in the first additional county since the inception of the transit authority. David Tulis / AJC Special

Credit: Leroy Chapman Jr.

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Credit: Leroy Chapman Jr.

Turner declined to say whether the third party is a law firm or another legal entity. County attorney Christie Barnes declined to discuss the matter.

Clayton Police Chief Greg Porter sent the Nov. 17 memo to the board of commissioners and chief operating officer Alex Cohilas. Porter accused Turner of undermining his authority by interfering in the daily operations of the police department. He also said Turner threatened numerous times to fire him if he did not do as he told him. The memo also noted that Turner ordered Porter to purchase an extra vehicle for his personal security detail even though the police department budget was tight.

Turner said Tuesday the commissioners decided last week to turn the memo over to the legal department which in turn assigned it to an outside firm. The same steps were taken earlier this year when Porter lodged a hostile workplace complaint against former COO Arrelle Anderson, Turner noted.