HOUSTON --The search is on for the gunman who shot and killed a Houston man who was out watering his front lawn. More than a month after his murder, his family is making a plea for help to find his killers. The family is in agony, waiting to hear anything about the person who killed their father, a man who they say was a pillar of his community. Clarence Vick, 61, was a former law enforcement chaplain and an active member of his church. Police have no leads in the case, and Vick's family says that has made their grief even more difficult. Vick was watering his flowers at 3830 Westhampton in the Hiram Clark neighborhood just after 2am on June 27 when his roommate, who was inside, heard arguing outside. He did not recognize the other voice, but heard Vick struggling with someone, then a gunshot. A short time later, Vick made it inside, bleeding from a gunshot wound to the abdomen. He died a short time later. "By this point, Mr. Vick has come back inside and he collapses on the dining room table. All he was able to tell him was that somebody tried to rob him. He was never able to give us a description of the suspect or suspects," said Sgt. Robert Odom of HPD Homicide. "Whenever he was needed, he was always there. No matter how busy he was, he would never turn anybody down," said Cara Vick, Clarence's daughter. Two men who were seen in the area two hours before the murder are being called persons of interest and police want to talk to them. Anyone with information is asked to call Crime Stoppers 713-222-TIPS. A $5,000 reward is being offered and you can remain anonymous.