The grandfather of a man accused of killing a college security officer calls his grandson quiet, and says he is not a violent person. He was shocked to learn that his grandson now faces murder charges.

Authorities have charged the man's 28-year-old grandson with first-degree murder and first-degree breaking and entering. They believe the 28 year old, along with another 18-year-old man, are responsible for killing a 28-year-old college security officer outside his home in Greensboro on Christmas Eve.

The 28-year-old man facing charges has had other brushes with the law, but only faced misdemeanor charges for drug possession, failure to comply and failure to appear in court.

The man was living with his grandfather when he was arrested. His grandfather said that he did not have a job, but that he often helped out around the house.

The man's grandfather has a hard time believing that he would take another person's life, but says that if the two men are guilty of the crimes, that they will have to deal with the consequences.

Police took the 28-year-old man into custody on Jan. 13. Both men who have been charged are being held in the Guilford County Jail.

The man who was shot was found outside of his home just after midnight on Dec. 24. He had recently been hired at Greensboro College. A colleague called police when he didn't show up for his shift that began at midnight.

Police won't say what led them to the two men, but claim to have probable cause to charge them with such serious crimes.

Source: WSOCTV, "Gastonia man accused of murder in Greensboro killing," Jan. 17, 2012