CHARLOTTE, N.C. — “Every time you think it’s finished,” WSAV-TV reporter Andrew Davis says of South Carolina’s Murdaugh saga, “there’s another turn.” No statement better sums up the twists and turns laid out in “Low Country: The Murdaugh Dynasty,” a new three-part HBO Max documentary series about Alex Murdaugh and his family’s legacy of power, corruption, entitlement and murder. The series debuts on the HBO streaming service Thursday, Nov. 3. Davis is one of several journalists interviewed for the series, helping explain the complicated case alongside local residents, victims, friends and atto…