PHILADELPHIA (WPVI) -- The man accused of killing a Philadelphia police officer is in court today for the start of his murder trial.



Rafael Jones faces murder and other charges for shooting and killing Officer Moses Walker Junior during a robbery attempt in 2012.



Chancier McFarland pleaded guilty to his role in the killing and agreed to testify against Jones, who prosecutors say was the triggerman.



Meanwhile, McFarland is expected to be sentenced today.