RICHMOND, Ky. (AP) — A grand jury has indicted four co-defendants in the fatal shooting of a central Kentucky police officer and in the attempted robbery he was investigating earlier this month.

A Madison County grand jury Tuesday indicted 34-year-old Raleigh Sizemore of Richmond, the man accused of shooting 33-year-old Daniel Ellis, multiple media outlets report.

Sizemore faces murder, two counts of attempted murder and four other charges.

Madison County Commonwealth's Attorney David Smith would not say whether he will seek the death penalty against Sizemore. Kentucky law allows the death penalty in murder cases where there is an "aggravating circumstance" such as robbery, rape or the death of a police officer.

Ellis died Nov. 6, two days after he was ambushed and shot in the head while searching an apartment for a robbery suspect.

Twenty-five-year-old Gregory Ratliff also was indicted on four charges, including complicity to murder. Forty-four-year-old Rita Creech and 35-year-old Carl Banks are facing charges related to the attempted robbery earlier in the day in Richmond.

Authorities said Ellis, a seven-year veteran of the department, went to Ratliff's apartment in search of Sizemore, who had hidden with Creech in the back bedroom. The indictment indicates that Sizmore was armed with a .22-caliber revolver.

Police have said that Sizemore admitted shooting Ellis as Ellis entered the bedroom and firing at two other officers as they entered the apartment to help Ellis.

Sizemore is being held at Kentucky State Reformatory in LaGrange in lieu of a $2.5 million bond. Ratliff's, Creech and Banks are being held in the Madison County Detention Center. Their bails are $2 million, $10,000 and $100,000 respectively.