At the age of 9, authorities say, Randy Young watched his father shoot and kill his mother. At the age of 31, the Catoosa County man mimicked the act by gunning down his estranged wife and 14-month-old daughter Monday as they ran from him to a neighbor's home. Young, who authorities say was taking several prescription medicines to treat depression, ended the violent outburst by killing himself. Neighbors were stunned by the scene, which shattered Christmas Day festivities and the serenity of their suburban neighborhood in the Boynton Community of Catoosa County. When the gunfire ended, three people lay dying on a neighbor's lawn. For the rest of the story, pick up a copy of the Friday, Dec. 29, edition of the Walker County Messenger