A man charged in the murder of a Russell County woman who was strangled during her morning jog now faces an additional charge of rape, Kentucky State Police announced Wednesday.

A grand jury returned the additional charge against Christopher Allman on Tuesday, according to a news release.

Allman is charged with murdering Sarah B. Hart, 31, on June 14 near Jamestown. Hart had been jogging with her sister when she felt ill and turned back to go to her car.

Allman allegedly attacked Hart as she walked alone along U.S. 127, strangling her and hiding her body at the edge of a field near the highway.

Allman admitted that he wanted to rob Hart, according to the arrest citation.

Allman, 28, was first charged with murder, robbery, kidnapping and tampering with physical evidence. A grand jury later added charges of being a persistent felony offender and fetal homicide, because Hart was pregnant.

Allman has pleaded not guilty. He could face a death sentence if convicted.