An investigation into a threat against East Baton Rouge Parish District Attorney Hillar Moore III and his office led to the most recent arrest of nationally acclaimed Baton Rouge rapper Torrance “Lil Boosie” Hatch, authorities said.

“I can confirm that we received information relative to a credible threat against District Attorney Hillar Moore and the District Attorney’s Office,” State Police Lt. Doug Cain said.

The East Baton Rouge Parish Violent Crime Unit initiated an investigation into the threat, Cain said, and “as a precaution, security was provided to the District Attorney and his office.”

Investigators were unable to substantiate the threat, Cain said. The case, however, is still open.

Cain would not say who made the threat, but that the investigation into it led to the May 26 arrest of Hatch, who is accused of trying to smuggle codeine syrup into the Louisiana State Penitentiary at Angola. Hatch has been in prison since he pleaded guilty in 2009 to a third-offense marijuana possession charge.

A grand jury indicted Hatch last year in the Oct. 21 slaying of 35-year-old Terry Boyd, who was shot through a window while inside his home at 16837 Vermillion Drive.