A judge recently permitted the county's district attorney to add a new charge in a homicide case against a Mercer County man.

Joshua K. Greaves, 37, of Mercer was charged in March 2017, for the alleged murder of Gregory W. Bosko, 55, of Kittanning, during a drug deal in Lyndora.

Prosecutors originally charged Greaves with homicide and other charges related to the circumstances surrounding Bosko's death.

District Attorney Richard Goldinger petitioned Judge William Shaffer in late July to add an additional charge — a felony charge of conspiracy to commit criminal homicide. Earlier this month Shaffer granted Goldinger's request, bringing the total charges Greaves faces to 16.

In addition to homicide, Greaves is charged with felony robbery, robbery of a motor vehicle, theft, two counts of receiving stolen property, hindering apprehension and abuse of a corpse. He also already faces several charges involving conspiracy.

Greaves and Tiffany N. Hilliard, 30, of Butler originally were charged in the case. The couple was arrested March 24, 2017, after allegedly being found in a vehicle owned by Bosko in the 300 block of West Wayne Street. Bosko's body was found April 1, 2017, wrapped in a green blanket with his throat cut.

Goldinger argued last month in his appeal to Shaffer that the additional charge of conspiracy homicide more accurately reflects the alleged crime because Greaves and Hilliard conspired together to kill Bosko.

Last summer, Hilliard was sentenced to jail for her role in the case. However, Goldinger said she will not face her own charge of conspiracy homicide.

Prosecutors expect the trial to be in the spring.

2017March 21: Joshua K. Greaves allegedly kills Gregory W. Bosko by slitting his throat during a drug deal in Lyndora.March 24: Greaves and Tiffany N. Hilliard charged with giving false names after being found in Bosko's car in the 300 block of West Wayne Street. Both were found to have bench warrants and were detained.Late March: The couple named as persons of interest in the disappearance of Bosko, who was reported missing March 20. Around the same time, police learned about Bosko's death through recorded phone calls Hilliard made to her mother from the jail. She eventually told authorities about the murder.April 1: Investigators discover Bosko's body wrapped in a green blanket on Redbud Road. His throat had been cut.May 8: Greaves formally charged. Among the criminal charges are homicide, felony robbery and abuse of a corpse. Hilliard is charged with robbery, inflicting serious bodily injury, robbery of a motor vehicle, theft, receiving stolen property, concealing/destroying evidence, abuse of a corpse and multiple conspiracy charges.November: Greaves' jury selection and trial is rescheduled for the first time by his defense attorneys to 2018.2018July: Greaves' jury selection and trial is rescheduled for the second time to sometime in the future with no set date.August: As part of a plea deal, Hilliard is sentenced to 18 to 36 months in jail for her role in the case after pleading guilty to felony robbery and abuse of a corpse, with all other charges dismissed.2019Jan. 10: Hilliard paroled.July 31: Greaves' jury selection and trial is rescheduled for the third time to spring 2020. District Attorney Richard Goldinger requests an additional charge of conspiracy homicide be added to the list of charges Greaves faces.Aug. 14: Judge William Shaffer grants Goldinger's request to add an additional charge of conspiracy homicide.