JAMESTOWN, Ky.-- Police have added a charge of fetal homicide against 28-year old Christopher Allman. He's charged with the murder of 31-year old Sarah Hart. She was strangled while out on a morning run in Russell County. Hart was pregnant with her fourth child.

Allman is also charged with kidnapping and robbery. Hart was running with her sister when she started not feeling well. She told her sister to continue without her.

Investigators say Hart was killed while returning to her car. Allman told police he killed Hart to steal her money. Her body was found in a field, not far from where she had been running.