The Delaware Department of Justice is planning to present an indictment related to the Feb. 1 takeover of James T. Vaughn Correctional Center’s Building C to a New Castle County grand jury within the next three months, a spokesman said Monday.

The development comes more than six months after the state launched a criminal probe into the 18-hour siege at the Smyrna facility, in which Lt. Steven Floyd Sr., a 47-year-old correctional officer, died. Two other guards were injured and taken hostage in the siege, and a fourth victim, a female counselor at the prison, was rescued shortly after police and staff from the Delaware Department of Correction retook the building in the early hours of Feb. 2.