greg holley cannot believe he's gone. >> absolutely senseless. senseless is the word i could say. >> pastor ronald jones took a class with greg holley at the new life anointed ministry church in woodbridge last night. minutes after it ended holley was dead. >> we left the class probably about 8:30, quarter to 9:00 and said he was going to go walk the dog, go home, do the homework that we had got assigned and i got word. >> word that greg holley, a retired atf agent and army reserve officer, a father with four boys, had been gunned down during a robbery steps from his home. >> what a tremendous loss. i mean the family is, of course, his wife is grieving. the boys just hurt because he was such a great man, such a great man. what a loss. >> an off-duty prince william county police officer spotted a man running from the scene after holley was shot. 25-year-old aric alexander smith was taken into custody after a brief struggle. he had a stolen gun on him and some of holley's personal belongings. >> i basically think it's a sign of the times which should make all of us embrace our families even the more, kiss