St. Tammany Parish Sheriff Randy Smith said Wednesday that the FBI has been brought in to help investigate the mysterious death of Nanette Krentel, who was found shot to death and badly burned in July.
Krentel, 49, was married to Steve Krentel, the chief of St. Tammany Fire Protection District No. 12.
Smith announced last month that the chief has been cleared as a suspect, but little new information has emerged since then.
On Wednesday, Smith's office said federal agents are now assisting with the difficult and lengthy investigation. Krentel died from a single gunshot wound to the head before a fire destroyed the couple's house in Lacombe, according to the St. Tammany Parish Coroner's Office.